isRestartCompletionEvent function
Returns true when the VM event signals that a hot restart has completed.
Matches either a Flutter.FirstFrame extension event (reliable on Android)
or an IsolateRunnable isolate event (reliable on iOS simulators where
Flutter.FirstFrame is not emitted after restart).
Implementation
bool isRestartCompletionEvent(Map<String, dynamic> event) {
return isFlutterFirstFrameEvent(event) || isIsolateRunnableEvent(event);
}