original_string: public function push(... $items) : Stack
      {
          $values = $this->_pushAll($items);
          $this->setValues($values);
          return $this;
      }
code: public function push(... $items) : Stack
      {
          $values = $this->_pushAll($items);
          $this->setValues($values);
          return $this;
      }
code_tokens: public function push ( ... $ items ) : Stack { $ values = $ this -> _pushAll ( $ items ) ; $ this -> setValues ( $ values ) ; return $ this ; }
docstring: Push item to the top of stack
  
  @param mixed $items
  
  @return Stack
docstring_tokens: Push item to the top of stack