original_string: public function addGroup($label)
      {
          $objGroup = new SelectGroup($label);
          $objGroup->setMeta("parent", $this, true);
  
          $this->__options->addObject($objGroup);
  
          return $objGroup;
      }
code: public function addGroup($label)
      {
          $objGroup = new SelectGroup($label);
          $objGroup->setMeta("parent", $this, true);
  
          $this->__options->addObject($objGroup);
  
          return $objGroup;
      }
code_tokens: public function addGroup ( $ label ) { $ objGroup = new SelectGroup ( $ label ) ; $ objGroup -> setMeta ( "parent" , $ this , true ) ; $ this -> __options -> addObject ( $ objGroup ) ; return $ objGroup ; }
docstring: Add optgroup element
  
  @param string $label The optgroup's label
  @return \ValidFormBuilder\SelectGroup
docstring_tokens: Add optgroup element