Encore\Admin\Grid\Filter::__call PHP Method

    public function __call($method, $arguments)
    {
        if (in_array($method, $this->allows)) {
            $className = '\\Encore\\Admin\\Grid\\Filter\\' . ucfirst($method);
            $reflection = new ReflectionClass($className);
            return $this->addFilter($reflection->newInstanceArgs($arguments));
        }
    }