map<TResult extends Object?> method

  1. @optionalTypeArgs
TResult map<TResult extends Object?>({
  1. required TResult server(
    1. ServerFailure value
    ),
  2. required TResult cache(
    1. CacheFailure value
    ),
  3. required TResult unexpected(
    1. UnexpectedFailure 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( ServerFailure value)  server,required TResult Function( CacheFailure value)  cache,required TResult Function( UnexpectedFailure value)  unexpected,}){
final _that = this;
switch (_that) {
case ServerFailure():
return server(_that);case CacheFailure():
return cache(_that);case UnexpectedFailure():
return unexpected(_that);case _:
  throw StateError('Unexpected subclass');

}
}