Gpf_Rpc_Form::setInfoMessage PHP Method

        public function setInfoMessage($message)
        {
            $this->infoMessage = $message;
        }

 /**
  * @anonym
  * @service custom_separator write
  * @param Gpf_Rpc_Params $params
  * @return Gpf_Rpc_Form
  */
 public function save(Gpf_Rpc_Params $params) {
     $form = new Gpf_Rpc_Form($params);
     Gpf_Settings::set(self::CUSTOM_SEPARATOR, $form->getFieldValue(self::CUSTOM_SEPARATOR));
     Gpf_Settings::set(self::HTML_COOKIE_VARIABLE, $form->getFieldValue(self::HTML_COOKIE_VARIABLE));
     $form->setInfoMessage($this->_('Configuration saved'));
     return $form;
 }