createVmService function
Implementation
Future<VmService> createVmService() async {
final devServiceURL = (await Service.getInfo()).serverUri;
if (devServiceURL == null) {
throw StateError('VM service not available! You need to run dart with --enable-vm-service.');
}
final wsURL = convertToWebSocketUrl(serviceProtocolUrl: devServiceURL);
return vmServiceConnectUri(wsURL.toString());
}