getNativeMapApprovalNumber method Null safety

Future<Map?> getNativeMapApprovalNumber()

获取原生地图map组件审图号 since 3.3.0

Implementation

Future<Map?> getNativeMapApprovalNumber() async {
  return await BMFMapDispatcherFactory.instance.mapCopyrightInfoDispatcher
      .getNativeMapApprovalNumber(_mapChannel);
}