requestAll 方法
实现
Future<PermissionStatus> requestAll(List<Map> permissions) =>
promiseToFuture<PermissionStatus>(JS(
"creates:PermissionStatus;", "#.requestAll(#)", this, permissions));
Future<PermissionStatus> requestAll(List<Map> permissions) =>
promiseToFuture<PermissionStatus>(JS(
"creates:PermissionStatus;", "#.requestAll(#)", this, permissions));