Granada\Orm\Wrapper::__call PHP Method

    public function __call($method, $parameters)
    {
        if (method_exists($this->_class_name, 'filter_' . $method)) {
            array_unshift($parameters, $this);
            return call_user_func_array(array($this->_class_name, 'filter_' . $method), $parameters);
        } else {
            throw new Exception(" no static {$method} found or static method 'filter_{$method}' not defined in " . $this->_class_name);
        }
    }