when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String requestId,
    2. int timestamp,
    3. bool success,
    4. T data,
    5. ErrorResponse? error,
    )
)

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?>(TResult Function( String requestId,  int timestamp,  bool success,  T data,  ErrorResponse? error)  $default,) {final _that = this;
switch (_that) {
case _GenericResponse():
return $default(_that.requestId,_that.timestamp,_that.success,_that.data,_that.error);case _:
  throw StateError('Unexpected subclass');

}
}