public function getRevereMigratedUntil($untilMigration) {
		$list = [];
		if(!in_array($untilMigration, array_keys($this->getList())))
			throw new \Exception($untilMigration.' is not in the list.');
		foreach(array_reverse($this->getList()) as $migration=>$params) {
			if(isset($params['migrated']))
				$list[] = $migration;
			if($migration == $untilMigration)
				break;
		}
		return $list;
	}