code: public Observable<PolicyEventsQueryResultsInner> listQueryResultsForManagementGroupAsync(String managementGroupName) {
          return listQueryResultsForManagementGroupWithServiceResponseAsync(managementGroupName).map(new Func1<ServiceResponse<PolicyEventsQueryResultsInner>, PolicyEventsQueryResultsInner>() {
              @Override
              public PolicyEventsQueryResultsInner call(ServiceResponse<PolicyEventsQueryResultsInner> response) {
                  return response.body();
              }
          });
      }
docs: Queries policy events for the resources under the management group.
  
  @param managementGroupName Management group name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PolicyEventsQueryResultsInner object