original_string: public function nth($key)
      {
          $items = array_keys($this->items);
  
          return isset($items[$key]) ? $this->offsetGet($items[$key]) : false;
      }
code: public function nth($key)
      {
          $items = array_keys($this->items);
  
          return isset($items[$key]) ? $this->offsetGet($items[$key]) : false;
      }
code_tokens: public function nth ( $ key ) { $ items = array_keys ( $ this -> items ) ; return isset ( $ items [ $ key ] ) ? $ this -> offsetGet ( $ items [ $ key ] ) : false ; }
docstring: Return nth item.
  
  @param int $key
  
  @return mixed|bool
docstring_tokens: Return nth item .