/**
  * {@inheritdoc}
  */
 protected function getVariantPlugin()
 {
     $variant_plugin = parent::getVariantPlugin();
     // Before showing the add form, we need to set the Panels storage
     // information so that it knows to give the user the IPE as an option.
     $this->setPanelsStorage($variant_plugin);
     return $variant_plugin;
 }