HeraldActionGroup.php
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	<?php

	abstract class HeraldActionGroup extends HeraldGroup {

	final public function getGroupKey() {
	$class = new ReflectionClass($this);

	$const = $class->getConstant('ACTIONGROUPKEY');
	if ($const === false) {
	throw new Exception(
	pht(
	'"%s" class "%s" must define a "%s" property.',
	__CLASS__,
	get_class($this),
	'ACTIONGROUPKEY'));
	}

	return $const;
	}

	final public static function getAllActionGroups() {
	return id(new PhutilClassMapQuery())
	->setAncestorClass(__CLASS__)
	->setUniqueMethod('getGroupKey')
	->setSortMethod('getSortKey')
	->execute();
	}
	}