map<TResult extends Object?> method

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

A switch-like method, using callbacks.

Callbacks receives the raw object, upcasted. It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case final Subclass2 value:
    return ...;
}

Implementation

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