Gpf_Rpc_Form::getFieldValue PHP Method

        public function getFieldValue($name)
        {
            $record = $this->fields->getRecord($name);
            return $record->get(self::FIELD_VALUE);
        }

 protected function execute(Gpf_Rpc_Params $params)
 {
     $form = new Gpf_Rpc_Form($params);
     if (!$form->getFieldValue(self::LICENSE_AGREE_NAME)) {
         $form->setFieldError(self::LICENSE_AGREE_NAME, $this->_('You have to agree license.'));
         $form->setErrorMessage($this->_('You have to agree license.'));
         return $form;
     }
     try {
         $setting = new Gpf_File_Settings();
         $settingsArray = $setting->getAll();
         if (is_array($settingsArray) && empty($settingsArray)) {
             $this->addDBDefaultSettings($setting);
         }
         $setting->saveAll();
         @chmod($setting->getSettingFileName(), 0777);
     } catch (Exception $e) {
         $form->setErrorMessage($this->_('Could not create settings file. Reason: %s', $e->getMessage()));
         return $form;
     }
     try {
         $info = $this->licenseManager->getLicense(trim($form->getFieldValue(self::LICENSE_ID_NAME)));
         if (!$info->isApplicationCodeValid()) {
             $form->setErrorMessage($this->_('Invalid license.'));
             return $form;
         }
     } catch (Exception $e) {
         $form->setErrorMessage($this->_('Could not validate license. Reason: %s', $e->getMessage()));
         return $form;
     }
     $this->setNextStep($form);
     return $form;
 }