maybeWhen<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeWhen<TResult extends Object?>({
  1. TResult unknown()?,
  2. TResult video(
    1. List<File> files
    )?,
  3. TResult image(
    1. List<File> files
    )?,
  4. TResult vr(
    1. List<File> files
    )?,
  5. TResult audio(
    1. List<File> files
    )?,
  6. TResult html(
    1. List<File> files
    )?,
  7. required TResult orElse(),
})

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>({TResult Function()?  unknown,TResult Function( List<File> files)?  video,TResult Function( List<File> files)?  image,TResult Function( List<File> files)?  vr,TResult Function( List<File> files)?  audio,TResult Function( List<File> files)?  html,required TResult orElse(),}) {final _that = this;
switch (_that) {
case Unknown() when unknown != null:
return unknown();case Video() when video != null:
return video(_that.files);case Image() when image != null:
return image(_that.files);case Model3D() when vr != null:
return vr(_that.files);case Audio() when audio != null:
return audio(_that.files);case Html() when html != null:
return html(_that.files);case _:
  return orElse();

}
}