/**
  * Handle the command.
  *
  * @param EntryFormBuilder $builder
  */
 public function handle(EntryFormBuilder $builder)
 {
     $type = $this->page->getType();
     $builder->setModel($type->getEntryModelName());
     $builder->setEntry($this->page->getEntryId());
     $this->builder->addForm('entry', $builder);
 }