public function setProgressSseTask($taskName = null) {
		if (empty($taskName)) {
			return false;
		}

		$tasks = (array)CakeSession::read('SSE.progress');
		if (in_array($taskName, $tasks)) {
			return true;
		}

		$tasks[] = $taskName;

		return CakeSession::write('SSE.progress', $tasks);
	}