Crud\Listener\RedirectListener::setup PHP Method

    public function setup()
    {
        $this->reader('request.key', function (Subject $subject, $key = null) {
            $request = $this->_request();
            if (!isset($request->{$key})) {
                return null;
            }
            return $request->{$key};
        });
        $this->reader('request.data', function (Subject $subject, $key = null) {
            $request = $this->_request();
            return $request->data($key);
        });
        $this->reader('request.query', function (Subject $subject, $key = null) {
            $request = $this->_request();
            return $request->query($key);
        });
        $this->reader('entity.field', function (Subject $subject, $key = null) {
            return $subject->entity->get($key);
        });
        $this->reader('subject.key', function (Subject $subject, $key = null) {
            if (!isset($subject->{$key})) {
                return null;
            }
            return $subject->{$key};
        });
    }