when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>({ required TResult knownValue(KnownRepoPutRecordValidationStatus data), required TResult unknown(String data), })

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>({required TResult Function( KnownRepoPutRecordValidationStatus data)  knownValue,required TResult Function( String data)  unknown,}) {final _that = this;
switch (_that) {
case RepoPutRecordValidationStatusKnownValue():
return knownValue(_that.data);case RepoPutRecordValidationStatusUnknown():
return unknown(_that.data);case _:
  throw StateError('Unexpected subclass');

}
}