updateIsFocus method Null safety

Future<bool> updateIsFocus(
  1. bool isFocus
)

更新是否可以被选中，获得焦点

Android独有

Implementation

Future<bool> updateIsFocus(bool isFocus) async {
  if (this.isFocus == isFocus) {
    return true;
  }

  bool ret = await BMFMapDispatcherFactory.instance.overlayDispatcher
      .updatePolylineMember(this.methodChannel,
          {'id': this.id, 'member': 'isFocus', 'value': isFocus});

  if (ret) {
    this.isFocus = isFocus;
  }

  return ret;
}