when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String id,
    2. String domainId,
    3. int levelNumber,
    4. String name,
    5. String? description,
    )
)

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 id,  String domainId,  int levelNumber,  String name,  String? description)  $default,) {final _that = this;
switch (_that) {
case _CurriculumLevel():
return $default(_that.id,_that.domainId,_that.levelNumber,_that.name,_that.description);case _:
  throw StateError('Unexpected subclass');

}
}