updateCheck method

Implementation

@override
U? updateCheck(_, U value, InputStatus status) {
  return hovered != status.hovered &&
      focused != status.focused &&
      touched != status.touched &&
      dirty != status.dirty &&
      empty != status.empty &&
      full != status.full &&
      edited != status.edited &&
      submitted != status.submitted &&
      fetch != status.fetch ? value : null;
}