1. Experimental()
Future<Isolate> spawnDomUri(Uri uri, List<String> args, message)

Spawn a DOM isolate using the given URI in the same window. This isolate is not concurrent. It runs on the browser thread with full access to the DOM. Note: this API is still evolving and may move to dart:isolate.

Source 

@Experimental()
Future<Isolate> spawnDomUri(Uri uri, List<String> args, message) {
  // TODO(17738): Plumb arguments and return value through.
  return _Utils.spawnDomUri(uri.toString());
}