getDefaultGroup() public method

Returns the default field group identifier.
public getDefaultGroup ( ) : string
return string
 public function processAddFieldDefinition(FormActionEvent $event)
 {
     // Reload the draft, to make sure we include any changes made in the current form submit
     $contentTypeDraft = $this->contentTypeService->loadContentTypeDraft($event->getData()->contentTypeDraft->id);
     $fieldTypeIdentifier = $event->getForm()->get('fieldTypeSelection')->getData();
     $maxFieldPos = 0;
     foreach ($contentTypeDraft->fieldDefinitions as $existingFieldDef) {
         if ($existingFieldDef->position > $maxFieldPos) {
             $maxFieldPos = $existingFieldDef->position;
         }
     }
     $fieldDefCreateStruct = new FieldDefinitionCreateStruct(['fieldTypeIdentifier' => $fieldTypeIdentifier, 'identifier' => sprintf('new_%s_%d', $fieldTypeIdentifier, count($contentTypeDraft->fieldDefinitions) + 1), 'names' => [$event->getOption('languageCode') => 'New FieldDefinition'], 'position' => $maxFieldPos + 1]);
     if (isset($this->groupsList)) {
         $fieldDefCreateStruct->fieldGroup = $this->groupsList->getDefaultGroup();
     }
     $this->contentTypeService->addFieldDefinition($contentTypeDraft, $fieldDefCreateStruct);
 }