/**
  * Adds document form metadata field
  */
 public function display_document_form_meta_box($document)
 {
     $this->build_fields($document->ID);
     $form = new \Proud\Core\FormHelper($this->key, $this->fields);
     $form->printFields();
 }
 public function display_agency_social_meta_box($agency)
 {
     $this->build_fields($agency->ID);
     $form = new \Proud\Core\FormHelper(self::$key, $this->fields);
     $form->printFields();
 }