diff --git a/src/applications/almanac/query/AlmanacDeviceSearchEngine.php b/src/applications/almanac/query/AlmanacDeviceSearchEngine.php
index 8b487c5df8..e7b631e0bd 100644
--- a/src/applications/almanac/query/AlmanacDeviceSearchEngine.php
+++ b/src/applications/almanac/query/AlmanacDeviceSearchEngine.php
@@ -7,7 +7,7 @@ final class AlmanacDeviceSearchEngine
     return pht('Almanac Devices');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorAlmanacApplication';
   }
 
diff --git a/src/applications/almanac/query/AlmanacNetworkSearchEngine.php b/src/applications/almanac/query/AlmanacNetworkSearchEngine.php
index e2b23d75b7..cb511d9c48 100644
--- a/src/applications/almanac/query/AlmanacNetworkSearchEngine.php
+++ b/src/applications/almanac/query/AlmanacNetworkSearchEngine.php
@@ -7,7 +7,7 @@ final class AlmanacNetworkSearchEngine
     return pht('Almanac Networks');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorAlmanacApplication';
   }
 
diff --git a/src/applications/almanac/query/AlmanacServiceSearchEngine.php b/src/applications/almanac/query/AlmanacServiceSearchEngine.php
index e5a3c80560..fe51fd09f2 100644
--- a/src/applications/almanac/query/AlmanacServiceSearchEngine.php
+++ b/src/applications/almanac/query/AlmanacServiceSearchEngine.php
@@ -7,7 +7,7 @@ final class AlmanacServiceSearchEngine
     return pht('Almanac Services');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorAlmanacApplication';
   }
 
diff --git a/src/applications/audit/query/PhabricatorCommitSearchEngine.php b/src/applications/audit/query/PhabricatorCommitSearchEngine.php
index 50ff7a0c1f..4e8dfd7d08 100644
--- a/src/applications/audit/query/PhabricatorCommitSearchEngine.php
+++ b/src/applications/audit/query/PhabricatorCommitSearchEngine.php
@@ -7,6 +7,10 @@ final class PhabricatorCommitSearchEngine
     return pht('Commits');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorDiffusionApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
 
diff --git a/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php b/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php
index ef6ee97d48..62e4a08a59 100644
--- a/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php
+++ b/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorCalendarEventSearchEngine
     return pht('Calendar Events');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorCalendarApplication';
   }
 
diff --git a/src/applications/conduit/query/PhabricatorConduitSearchEngine.php b/src/applications/conduit/query/PhabricatorConduitSearchEngine.php
index 199ab70216..0ed7a95b44 100644
--- a/src/applications/conduit/query/PhabricatorConduitSearchEngine.php
+++ b/src/applications/conduit/query/PhabricatorConduitSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorConduitSearchEngine
     return pht('Conduit Methods');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorConduitApplication';
   }
 
diff --git a/src/applications/countdown/query/PhabricatorCountdownSearchEngine.php b/src/applications/countdown/query/PhabricatorCountdownSearchEngine.php
index 2e8cab39d9..f15c1a2012 100644
--- a/src/applications/countdown/query/PhabricatorCountdownSearchEngine.php
+++ b/src/applications/countdown/query/PhabricatorCountdownSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorCountdownSearchEngine
     return pht('Countdowns');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorCountdownApplication';
   }
 
diff --git a/src/applications/dashboard/customfield/PhabricatorDashboardPanelSearchApplicationCustomField.php b/src/applications/dashboard/customfield/PhabricatorDashboardPanelSearchApplicationCustomField.php
index 20c9034f89..508486b379 100644
--- a/src/applications/dashboard/customfield/PhabricatorDashboardPanelSearchApplicationCustomField.php
+++ b/src/applications/dashboard/customfield/PhabricatorDashboardPanelSearchApplicationCustomField.php
@@ -16,6 +16,17 @@ final class PhabricatorDashboardPanelSearchApplicationCustomField
     $engines = id(new PhutilSymbolLoader())
       ->setAncestorClass('PhabricatorApplicationSearchEngine')
       ->loadObjects();
+    $all_apps = id(new PhabricatorApplicationQuery())
+      ->setViewer($this->getViewer())
+      ->withUnlisted(false)
+      ->withInstalled(true)
+      ->execute();
+    foreach ($engines as $index => $engine) {
+      if (!isset($all_apps[$engine->getApplicationClassName()])) {
+        unset($engines[$index]);
+        continue;
+      }
+    }
 
     $options = array();
 
diff --git a/src/applications/dashboard/query/PhabricatorDashboardPanelSearchEngine.php b/src/applications/dashboard/query/PhabricatorDashboardPanelSearchEngine.php
index 7a50e56526..229250a55c 100644
--- a/src/applications/dashboard/query/PhabricatorDashboardPanelSearchEngine.php
+++ b/src/applications/dashboard/query/PhabricatorDashboardPanelSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorDashboardPanelSearchEngine
     return pht('Dashboard Panels');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDashboardApplication';
   }
 
diff --git a/src/applications/dashboard/query/PhabricatorDashboardSearchEngine.php b/src/applications/dashboard/query/PhabricatorDashboardSearchEngine.php
index f6f50b41ff..271e0b763c 100644
--- a/src/applications/dashboard/query/PhabricatorDashboardSearchEngine.php
+++ b/src/applications/dashboard/query/PhabricatorDashboardSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorDashboardSearchEngine
     return pht('Dashboards');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDashboardApplication';
   }
 
diff --git a/src/applications/differential/query/DifferentialRevisionSearchEngine.php b/src/applications/differential/query/DifferentialRevisionSearchEngine.php
index d3cb3d9518..82e720a4e5 100644
--- a/src/applications/differential/query/DifferentialRevisionSearchEngine.php
+++ b/src/applications/differential/query/DifferentialRevisionSearchEngine.php
@@ -7,7 +7,7 @@ final class DifferentialRevisionSearchEngine
     return pht('Differential Revisions');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDifferentialApplication';
   }
 
diff --git a/src/applications/diviner/query/DivinerAtomSearchEngine.php b/src/applications/diviner/query/DivinerAtomSearchEngine.php
index ff9e7e480c..d1c0f734ed 100644
--- a/src/applications/diviner/query/DivinerAtomSearchEngine.php
+++ b/src/applications/diviner/query/DivinerAtomSearchEngine.php
@@ -6,7 +6,7 @@ final class DivinerAtomSearchEngine extends PhabricatorApplicationSearchEngine {
     return pht('Documentation Atoms');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDivinerApplication';
   }
 
diff --git a/src/applications/drydock/query/DrydockBlueprintSearchEngine.php b/src/applications/drydock/query/DrydockBlueprintSearchEngine.php
index 8895ed09bb..8b732e9313 100644
--- a/src/applications/drydock/query/DrydockBlueprintSearchEngine.php
+++ b/src/applications/drydock/query/DrydockBlueprintSearchEngine.php
@@ -7,7 +7,7 @@ final class DrydockBlueprintSearchEngine
     return pht('Drydock Blueprints');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDrydockApplication';
   }
 
diff --git a/src/applications/drydock/query/DrydockLeaseSearchEngine.php b/src/applications/drydock/query/DrydockLeaseSearchEngine.php
index fffca96a3b..39080a05ac 100644
--- a/src/applications/drydock/query/DrydockLeaseSearchEngine.php
+++ b/src/applications/drydock/query/DrydockLeaseSearchEngine.php
@@ -7,7 +7,7 @@ final class DrydockLeaseSearchEngine
     return pht('Drydock Leases');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDrydockApplication';
   }
 
diff --git a/src/applications/drydock/query/DrydockLogSearchEngine.php b/src/applications/drydock/query/DrydockLogSearchEngine.php
index 915c503868..1c4c2374e0 100644
--- a/src/applications/drydock/query/DrydockLogSearchEngine.php
+++ b/src/applications/drydock/query/DrydockLogSearchEngine.php
@@ -6,7 +6,7 @@ final class DrydockLogSearchEngine extends PhabricatorApplicationSearchEngine {
     return pht('Drydock Logs');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDrydockApplication';
   }
 
diff --git a/src/applications/drydock/query/DrydockResourceSearchEngine.php b/src/applications/drydock/query/DrydockResourceSearchEngine.php
index a17d2fd600..1a9b93b465 100644
--- a/src/applications/drydock/query/DrydockResourceSearchEngine.php
+++ b/src/applications/drydock/query/DrydockResourceSearchEngine.php
@@ -7,7 +7,7 @@ final class DrydockResourceSearchEngine
     return pht('Drydock Resources');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDrydockApplication';
   }
 
diff --git a/src/applications/feed/query/PhabricatorFeedSearchEngine.php b/src/applications/feed/query/PhabricatorFeedSearchEngine.php
index d84960e950..49d65770bd 100644
--- a/src/applications/feed/query/PhabricatorFeedSearchEngine.php
+++ b/src/applications/feed/query/PhabricatorFeedSearchEngine.php
@@ -7,6 +7,10 @@ final class PhabricatorFeedSearchEngine
     return pht('Feed Stories');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorFeedApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
 
diff --git a/src/applications/files/query/PhabricatorFileSearchEngine.php b/src/applications/files/query/PhabricatorFileSearchEngine.php
index c11361be69..fa9d2332c7 100644
--- a/src/applications/files/query/PhabricatorFileSearchEngine.php
+++ b/src/applications/files/query/PhabricatorFileSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorFileSearchEngine
     return pht('Files');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorFilesApplication';
   }
 
diff --git a/src/applications/flag/query/PhabricatorFlagSearchEngine.php b/src/applications/flag/query/PhabricatorFlagSearchEngine.php
index 4c9308f04f..9975a3985f 100644
--- a/src/applications/flag/query/PhabricatorFlagSearchEngine.php
+++ b/src/applications/flag/query/PhabricatorFlagSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorFlagSearchEngine
     return pht('Flags');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorFlagsApplication';
   }
 
diff --git a/src/applications/fund/query/FundBackerSearchEngine.php b/src/applications/fund/query/FundBackerSearchEngine.php
index a634fbfe42..563838a954 100644
--- a/src/applications/fund/query/FundBackerSearchEngine.php
+++ b/src/applications/fund/query/FundBackerSearchEngine.php
@@ -18,7 +18,7 @@ final class FundBackerSearchEngine
     return pht('Fund Backers');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorFundApplication';
   }
 
diff --git a/src/applications/fund/query/FundInitiativeSearchEngine.php b/src/applications/fund/query/FundInitiativeSearchEngine.php
index 63c25952ee..52c97e7a95 100644
--- a/src/applications/fund/query/FundInitiativeSearchEngine.php
+++ b/src/applications/fund/query/FundInitiativeSearchEngine.php
@@ -7,7 +7,7 @@ final class FundInitiativeSearchEngine
     return pht('Fund Initiatives');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorFundApplication';
   }
 
diff --git a/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php b/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php
index d72d9e18f3..dce8672a56 100644
--- a/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php
+++ b/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php
@@ -7,7 +7,7 @@ final class HarbormasterBuildPlanSearchEngine
     return pht('Harbormaster Build Plans');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorHarbormasterApplication';
   }
 
diff --git a/src/applications/harbormaster/query/HarbormasterBuildableSearchEngine.php b/src/applications/harbormaster/query/HarbormasterBuildableSearchEngine.php
index 48dc7053cb..74883c5c10 100644
--- a/src/applications/harbormaster/query/HarbormasterBuildableSearchEngine.php
+++ b/src/applications/harbormaster/query/HarbormasterBuildableSearchEngine.php
@@ -7,7 +7,7 @@ final class HarbormasterBuildableSearchEngine
     return pht('Harbormaster Buildables');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorHarbormasterApplication';
   }
 
diff --git a/src/applications/herald/query/HeraldRuleSearchEngine.php b/src/applications/herald/query/HeraldRuleSearchEngine.php
index 1d8bfdda6b..dace06725d 100644
--- a/src/applications/herald/query/HeraldRuleSearchEngine.php
+++ b/src/applications/herald/query/HeraldRuleSearchEngine.php
@@ -6,7 +6,7 @@ final class HeraldRuleSearchEngine extends PhabricatorApplicationSearchEngine {
     return pht('Herald Rules');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorHeraldApplication';
   }
 
diff --git a/src/applications/herald/query/HeraldTranscriptSearchEngine.php b/src/applications/herald/query/HeraldTranscriptSearchEngine.php
index 9696a84391..f6944e1215 100644
--- a/src/applications/herald/query/HeraldTranscriptSearchEngine.php
+++ b/src/applications/herald/query/HeraldTranscriptSearchEngine.php
@@ -7,7 +7,7 @@ final class HeraldTranscriptSearchEngine
     return pht('Herald Transcripts');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorHeraldApplication';
   }
 
diff --git a/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php b/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php
index 65400d765c..ebc9cd2b03 100644
--- a/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php
+++ b/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php
@@ -7,7 +7,7 @@ final class LegalpadDocumentSearchEngine
     return pht('Legalpad Documents');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorLegalpadApplication';
   }
 
diff --git a/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php b/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php
index 6ff09f412c..9f77866560 100644
--- a/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php
+++ b/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php
@@ -9,7 +9,7 @@ final class LegalpadDocumentSignatureSearchEngine
     return pht('Legalpad Signatures');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorLegalpadApplication';
   }
 
diff --git a/src/applications/macro/query/PhabricatorMacroSearchEngine.php b/src/applications/macro/query/PhabricatorMacroSearchEngine.php
index 934d98bb01..8e00c45f17 100644
--- a/src/applications/macro/query/PhabricatorMacroSearchEngine.php
+++ b/src/applications/macro/query/PhabricatorMacroSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorMacroSearchEngine
     return pht('Macros');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorMacroApplication';
   }
 
diff --git a/src/applications/mailinglists/query/PhabricatorMailingListSearchEngine.php b/src/applications/mailinglists/query/PhabricatorMailingListSearchEngine.php
index 54fe898546..50443430a9 100644
--- a/src/applications/mailinglists/query/PhabricatorMailingListSearchEngine.php
+++ b/src/applications/mailinglists/query/PhabricatorMailingListSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorMailingListSearchEngine
     return pht('Mailing Lists');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorMailingListsApplication';
   }
 
diff --git a/src/applications/maniphest/query/ManiphestTaskSearchEngine.php b/src/applications/maniphest/query/ManiphestTaskSearchEngine.php
index 4d0e1381d7..7ad2a09d5b 100644
--- a/src/applications/maniphest/query/ManiphestTaskSearchEngine.php
+++ b/src/applications/maniphest/query/ManiphestTaskSearchEngine.php
@@ -34,7 +34,7 @@ final class ManiphestTaskSearchEngine
     return pht('Tasks');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorManiphestApplication';
   }
 
diff --git a/src/applications/meta/query/PhabricatorAppSearchEngine.php b/src/applications/meta/query/PhabricatorAppSearchEngine.php
index 6e9bd71239..a25260b6f6 100644
--- a/src/applications/meta/query/PhabricatorAppSearchEngine.php
+++ b/src/applications/meta/query/PhabricatorAppSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorAppSearchEngine
     return pht('Applications');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorApplicationsApplication';
   }
 
diff --git a/src/applications/notification/query/PhabricatorNotificationSearchEngine.php b/src/applications/notification/query/PhabricatorNotificationSearchEngine.php
index aa6d14212e..ea1c3beef4 100644
--- a/src/applications/notification/query/PhabricatorNotificationSearchEngine.php
+++ b/src/applications/notification/query/PhabricatorNotificationSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorNotificationSearchEngine
     return pht('Notifications');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorNotificationsApplication';
   }
 
diff --git a/src/applications/oauthserver/query/PhabricatorOAuthServerClientSearchEngine.php b/src/applications/oauthserver/query/PhabricatorOAuthServerClientSearchEngine.php
index e0729015f2..634debc43e 100644
--- a/src/applications/oauthserver/query/PhabricatorOAuthServerClientSearchEngine.php
+++ b/src/applications/oauthserver/query/PhabricatorOAuthServerClientSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorOAuthServerClientSearchEngine
     return pht('OAuth Clients');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorOAuthServerApplication';
   }
 
diff --git a/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php b/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php
index 3f1bac81e5..f503510e5a 100644
--- a/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php
+++ b/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php
@@ -7,7 +7,7 @@ final class PassphraseCredentialSearchEngine
     return pht('Passphrase Credentials');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorPassphraseApplication';
   }
 
diff --git a/src/applications/paste/query/PhabricatorPasteSearchEngine.php b/src/applications/paste/query/PhabricatorPasteSearchEngine.php
index d1c90e093d..d2d677ea5a 100644
--- a/src/applications/paste/query/PhabricatorPasteSearchEngine.php
+++ b/src/applications/paste/query/PhabricatorPasteSearchEngine.php
@@ -7,6 +7,10 @@ final class PhabricatorPasteSearchEngine
     return pht('Pastes');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorPasteApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
     $saved->setParameter(
diff --git a/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php b/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
index 5c1836ce8c..8e75efed6c 100644
--- a/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
+++ b/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorPeopleLogSearchEngine
     return pht('Account Activity');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorPeopleApplication';
   }
 
diff --git a/src/applications/people/query/PhabricatorPeopleSearchEngine.php b/src/applications/people/query/PhabricatorPeopleSearchEngine.php
index 4fbb1371fc..4785cd985d 100644
--- a/src/applications/people/query/PhabricatorPeopleSearchEngine.php
+++ b/src/applications/people/query/PhabricatorPeopleSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorPeopleSearchEngine
     return pht('Users');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorPeopleApplication';
   }
 
diff --git a/src/applications/pholio/query/PholioMockSearchEngine.php b/src/applications/pholio/query/PholioMockSearchEngine.php
index 2940031057..478e2cc219 100644
--- a/src/applications/pholio/query/PholioMockSearchEngine.php
+++ b/src/applications/pholio/query/PholioMockSearchEngine.php
@@ -6,7 +6,7 @@ final class PholioMockSearchEngine extends PhabricatorApplicationSearchEngine {
     return pht('Pholio Mocks');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorPholioApplication';
   }
 
diff --git a/src/applications/phortune/query/PhortuneCartSearchEngine.php b/src/applications/phortune/query/PhortuneCartSearchEngine.php
index fca225a612..72f4fa3469 100644
--- a/src/applications/phortune/query/PhortuneCartSearchEngine.php
+++ b/src/applications/phortune/query/PhortuneCartSearchEngine.php
@@ -38,6 +38,10 @@ final class PhortuneCartSearchEngine
     return pht('Phortune Orders');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorPhortuneApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
 
diff --git a/src/applications/phortune/query/PhortuneChargeSearchEngine.php b/src/applications/phortune/query/PhortuneChargeSearchEngine.php
index ba87cffc75..939eadd5c5 100644
--- a/src/applications/phortune/query/PhortuneChargeSearchEngine.php
+++ b/src/applications/phortune/query/PhortuneChargeSearchEngine.php
@@ -18,6 +18,10 @@ final class PhortuneChargeSearchEngine
     return pht('Phortune Charges');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorPhortuneApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
 
diff --git a/src/applications/phortune/query/PhortuneMerchantSearchEngine.php b/src/applications/phortune/query/PhortuneMerchantSearchEngine.php
index efb8cd5672..20f1da8e6e 100644
--- a/src/applications/phortune/query/PhortuneMerchantSearchEngine.php
+++ b/src/applications/phortune/query/PhortuneMerchantSearchEngine.php
@@ -7,6 +7,10 @@ final class PhortuneMerchantSearchEngine
     return pht('Phortune Merchants');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorPhortuneApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
 
diff --git a/src/applications/phortune/query/PhortuneSubscriptionSearchEngine.php b/src/applications/phortune/query/PhortuneSubscriptionSearchEngine.php
index 90ea7f82fa..0806197dd8 100644
--- a/src/applications/phortune/query/PhortuneSubscriptionSearchEngine.php
+++ b/src/applications/phortune/query/PhortuneSubscriptionSearchEngine.php
@@ -28,6 +28,10 @@ final class PhortuneSubscriptionSearchEngine
     return pht('Phortune Subscriptions');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorPhortuneApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
 
diff --git a/src/applications/phrequent/query/PhrequentSearchEngine.php b/src/applications/phrequent/query/PhrequentSearchEngine.php
index 65fb33bd11..b5737c945c 100644
--- a/src/applications/phrequent/query/PhrequentSearchEngine.php
+++ b/src/applications/phrequent/query/PhrequentSearchEngine.php
@@ -6,7 +6,7 @@ final class PhrequentSearchEngine extends PhabricatorApplicationSearchEngine {
     return pht('Phrequent Time');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorPhrequentApplication';
   }
 
diff --git a/src/applications/phriction/query/PhrictionSearchEngine.php b/src/applications/phriction/query/PhrictionSearchEngine.php
index 624fb99918..dea2e3120a 100644
--- a/src/applications/phriction/query/PhrictionSearchEngine.php
+++ b/src/applications/phriction/query/PhrictionSearchEngine.php
@@ -7,6 +7,10 @@ final class PhrictionSearchEngine
     return pht('Wiki Documents');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorPhrictionApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
 
diff --git a/src/applications/ponder/query/PonderQuestionSearchEngine.php b/src/applications/ponder/query/PonderQuestionSearchEngine.php
index ef1d277c5e..462046544c 100644
--- a/src/applications/ponder/query/PonderQuestionSearchEngine.php
+++ b/src/applications/ponder/query/PonderQuestionSearchEngine.php
@@ -7,7 +7,7 @@ final class PonderQuestionSearchEngine
     return pht('Ponder Questions');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorPonderApplication';
   }
 
diff --git a/src/applications/project/query/PhabricatorProjectSearchEngine.php b/src/applications/project/query/PhabricatorProjectSearchEngine.php
index 28013ec4dc..0297e910e5 100644
--- a/src/applications/project/query/PhabricatorProjectSearchEngine.php
+++ b/src/applications/project/query/PhabricatorProjectSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorProjectSearchEngine
     return pht('Projects');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorProjectApplication';
   }
 
diff --git a/src/applications/releeph/query/ReleephBranchSearchEngine.php b/src/applications/releeph/query/ReleephBranchSearchEngine.php
index 24f0a9818a..8f8810f670 100644
--- a/src/applications/releeph/query/ReleephBranchSearchEngine.php
+++ b/src/applications/releeph/query/ReleephBranchSearchEngine.php
@@ -9,6 +9,10 @@ final class ReleephBranchSearchEngine
     return pht('Releeph Branches');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorReleephApplication';
+  }
+
   public function setProduct(ReleephProject $product) {
     $this->product = $product;
     return $this;
diff --git a/src/applications/releeph/query/ReleephProductSearchEngine.php b/src/applications/releeph/query/ReleephProductSearchEngine.php
index e3a30c1a56..51f1bcb560 100644
--- a/src/applications/releeph/query/ReleephProductSearchEngine.php
+++ b/src/applications/releeph/query/ReleephProductSearchEngine.php
@@ -7,7 +7,7 @@ final class ReleephProductSearchEngine
     return pht('Releeph Products');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorReleephApplication';
   }
 
diff --git a/src/applications/releeph/query/ReleephRequestSearchEngine.php b/src/applications/releeph/query/ReleephRequestSearchEngine.php
index 35ebb3c202..5f2626614b 100644
--- a/src/applications/releeph/query/ReleephRequestSearchEngine.php
+++ b/src/applications/releeph/query/ReleephRequestSearchEngine.php
@@ -10,6 +10,10 @@ final class ReleephRequestSearchEngine
     return pht('Releeph Pull Requests');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorReleephApplication';
+  }
+
   public function setBranch(ReleephBranch $branch) {
     $this->branch = $branch;
     return $this;
diff --git a/src/applications/repository/query/PhabricatorRepositoryPushLogSearchEngine.php b/src/applications/repository/query/PhabricatorRepositoryPushLogSearchEngine.php
index 68fc754a40..25cb871cfc 100644
--- a/src/applications/repository/query/PhabricatorRepositoryPushLogSearchEngine.php
+++ b/src/applications/repository/query/PhabricatorRepositoryPushLogSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorRepositoryPushLogSearchEngine
     return pht('Push Logs');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDiffusionApplication';
   }
 
diff --git a/src/applications/repository/query/PhabricatorRepositorySearchEngine.php b/src/applications/repository/query/PhabricatorRepositorySearchEngine.php
index 90b1afaa5d..6a2a2458f2 100644
--- a/src/applications/repository/query/PhabricatorRepositorySearchEngine.php
+++ b/src/applications/repository/query/PhabricatorRepositorySearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorRepositorySearchEngine
     return pht('Repositories');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorDiffusionApplication';
   }
 
diff --git a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
index adc0b9146e..cdbd41275e 100644
--- a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
+++ b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
@@ -243,9 +243,7 @@ abstract class PhabricatorApplicationSearchEngine {
     return $this->application;
   }
 
-  protected function getApplicationClassName() {
-    throw new PhutilMethodNotImplementedException();
-  }
+  abstract public function getApplicationClassName();
 
 
 /* -(  Constructing Engines  )----------------------------------------------- */
diff --git a/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php b/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
index f810dcb76b..5b1e79cc2f 100644
--- a/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
+++ b/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
@@ -7,7 +7,7 @@ final class PhabricatorSearchApplicationSearchEngine
     return pht('Fulltext Results');
   }
 
-  protected function getApplicationClassName() {
+  public function getApplicationClassName() {
     return 'PhabricatorSearchApplication';
   }
 
diff --git a/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php b/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php
index 25f5e59f60..33520978a1 100644
--- a/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php
+++ b/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php
@@ -7,6 +7,10 @@ final class PhabricatorSlowvoteSearchEngine
     return pht('Slowvotes');
   }
 
+  public function getApplicationClassName() {
+    return 'PhabricatorSlowvoteApplication';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();
     $saved->setParameter(