Gc\Datatype\Model::loadPrevalueEditor PHP Method

    public static function loadPrevalueEditor(AbstractDatatype $datatype)
    {
        $fieldset = new Fieldset('prevalue-editor');
        AbstractForm::addContent($fieldset, $datatype->getPrevalueEditor()->load());
        return $fieldset;
    }

 /**
  * Edit datatype
  *
  * @return \Zend\View\Model\ViewModel|array
  */
 public function editAction()
 {
     $datatypeModel = Datatype\Model::fromId($this->getRouteMatch()->getParam('id'));
     if (empty($datatypeModel)) {
         return $this->redirect()->toRoute('development/datatype');
     }
     $datatype = Datatype\Model::loadDatatype($this->getServiceLocator(), $this->getRouteMatch()->getParam('id'));
     $datatypeForm = new DatatypeForm();
     $datatypeForm->setAttribute('action', $this->url()->fromRoute('development/datatype/edit', array('id' => $this->getRouteMatch()->getParam('id'))));
     DatatypeForm::addContent($datatypeForm, Datatype\Model::loadPrevalueEditor($datatype));
     $datatypeForm->loadValues($datatypeModel);
     if ($this->getRequest()->isPost()) {
         $post = $this->getRequest()->getPost()->toArray();
         $datatypeForm->setData($post);
         if (!$datatypeForm->isValid()) {
             $this->flashMessenger()->addErrorMessage('Can not save datatype');
             $this->useFlashMessenger();
         } else {
             if ($datatypeModel->getModel() != $datatypeForm->getValue('model')) {
                 $datatypeModel->setPrevalueValue(array());
             } else {
                 $datatypeModel->setPrevalueValue(Datatype\Model::savePrevalueEditor($datatype));
             }
             try {
                 $datatypeModel->addData($datatypeForm->getInputFilter()->getValues());
                 if ($datatypeModel->save()) {
                     $this->flashMessenger()->addSuccessMessage('This datatype has been saved');
                     return $this->redirect()->toRoute('development/datatype/edit', array('id' => $datatypeModel->getId()));
                 }
             } catch (Exception $e) {
                 throw new \Gc\Exception($e->getMessage(), $e->getCode(), $e);
             }
             $this->flashMessenger()->addErrorMessage('Error during editing.');
             return $this->redirect()->toRoute('development/datatype/edit', array('id' => $datatypeModel->getId()));
         }
     }
     return array('form' => $datatypeForm, 'infos' => $datatype->getInfos());
 }