code: public function getBetterButtonsUtils()
      {
          $buttons = $this->getDefaultButtonList("BetterButtonsUtils");
          $utils = $this->createFieldList($buttons);
  
          $this->owner->extend('updateBetterButtonsUtils', $utils);
  
          return $utils;
      }
docs: Gets the default utils for all DataObjects. Can be overloaded in subclasses.
  Utils are actions that appear in the top of the GridFieldDetailForm
  <code>
  public function getBetterButtonsUtils()
  {
  $utils = parent::getBetterButtonsUtils();
  $utils->push(BetterButtonCustomAction::create('myaction','Do something to this record'));
  
  return $utils;
  }
  </code>
  
  @return FieldList