public function getGroupAction($groupActions = null) {
		if (!$this->_controller->request->is('post')) {
			return false;
		}

		$action = $this->_controller->request->data('FilterGroup.action');
		if (empty($action) || (!empty($groupActions) && !is_array($groupActions))) {
			return false;
		}

		if (empty($groupActions)) {
			return $action;
		} elseif (in_array($action, $groupActions)) {
			return $action;
		} else {
			return false;
		}
	}