when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. Map<String, VersionConstraint?>? environment,
    2. String? publishTo,
    3. Uri? repository,
    4. Uri? issueTracker,
    5. List<String>? topics,
    6. String? documentation,
    7. String? resolution,
    8. Map<String, Dependency>? dependencies,
    )
)

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( Map<String, VersionConstraint?>? environment,  String? publishTo,  Uri? repository,  Uri? issueTracker,  List<String>? topics,  String? documentation,  String? resolution,  Map<String, Dependency>? dependencies)  $default,) {final _that = this;
switch (_that) {
case _Catalog():
return $default(_that.environment,_that.publishTo,_that.repository,_that.issueTracker,_that.topics,_that.documentation,_that.resolution,_that.dependencies);case _:
  throw StateError('Unexpected subclass');

}
}