HeraldStateReasons.php
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			<?php

			abstract class HeraldStateReasons extends Phobject {

			abstract public function explainReason($reason);

			final public static function getAllReasons() {
			return id(new PhutilClassMapQuery())
			->setAncestorClass(__CLASS__)
			->execute();
			}

			final public static function getExplanation($reason) {
			$reasons = self::getAllReasons();

			foreach ($reasons as $reason_implementation) {
			$explanation = $reason_implementation->explainReason($reason);
			if ($explanation !== null) {
			return $explanation;
			}
			}

			return pht('Unknown reason ("%s").', $reason);
			}

			}

phab/src/applications/herald/state/HeraldStateReasons.php69ece5ff2d79stable