attachThreads property
When enabled, the current isolate will be attached to the event. This only applies to Dart:io platforms and only the current isolate. The Dart runtime doesn't provide information about other active isolates.
When running on web, this option has no effect at all.
When running in the Flutter context, this enables attaching of threads for native events, if supported for the native platform. Currently, this is only supported on Android.
Implementation
bool attachThreads = false;