maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  1. TResult done(
    1. PickerLoadStatusDone value
    )?,
  2. TResult error(
    1. PickerLoadStatusError value
    )?,
  3. TResult progress(
    1. PickerLoadStatusProgress value
    )?,
  4. required TResult orElse(),
})

A variant of map that fallback to returning orElse.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult maybeMap<TResult extends Object?>({TResult Function( PickerLoadStatusDone value)?  done,TResult Function( PickerLoadStatusError value)?  error,TResult Function( PickerLoadStatusProgress value)?  progress,required TResult orElse(),}){
final _that = this;
switch (_that) {
case PickerLoadStatusDone() when done != null:
return done(_that);case PickerLoadStatusError() when error != null:
return error(_that);case PickerLoadStatusProgress() when progress != null:
return progress(_that);case _:
  return orElse();

}
}