Accessmap::can PHP Метод

    public function can($action)
    {
        if (isset($this->_access_details[$action])) {
            return $this->_access_details[$action];
        }
        $index = array_search($action, $this->_access_arr);
        if ($index === FALSE) {
            return $this->_access_details[$action] = FALSE;
        }
        return $this->_access_details[$action] = (bool) ($this->_access_val & pow(2, $index));
    }