phorge-phorge/src/infrastructure/env/PhabricatorConfigSiteSource.php

<?php

/**
 * Optional configuration source which loads between local sources and the
 * database source.
 *
 * Subclasses of this source can read external configuration sources (like a
 * remote server).
 */
abstract class PhabricatorConfigSiteSource
  extends PhabricatorConfigProxySource {

  public function getPriority() {
    return 1000.0;
  }

}