/** * Whether a offset exists * @link http://php.net/manual/en/arrayaccess.offsetexists.php * * @param mixed $offset <p> * An offset to check for. * </p> * * @return boolean true on success or false on failure. * </p> * <p> * The return value will be casted to boolean if non-boolean was returned. * @since 5.0.0 */ public function offsetExists($offset) { return $this->fields->offsetExists($offset); }