onMachineDone method
Implementation
void onMachineDone(
void Function(MachineDoneHandlerBuilder<CurrentState> builder) buildHandler,
) {
var builder = MachineDoneHandlerBuilder<CurrentState>._(
key,
(_) => _currentStateRef.value!,
_log,
'Machine Done',
);
buildHandler(builder);
_doneDescriptor = builder.descriptor;
}