code: public Observable<ExpressRouteCrossConnectionInner> beginUpdateTagsAsync(String resourceGroupName, String crossConnectionName) {
          return beginUpdateTagsWithServiceResponseAsync(resourceGroupName, crossConnectionName).map(new Func1<ServiceResponse<ExpressRouteCrossConnectionInner>, ExpressRouteCrossConnectionInner>() {
              @Override
              public ExpressRouteCrossConnectionInner call(ServiceResponse<ExpressRouteCrossConnectionInner> response) {
                  return response.body();
              }
          });
      }
docs: Updates an express route cross connection tags.
  
  @param resourceGroupName The name of the resource group.
  @param crossConnectionName The name of the cross connection.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ExpressRouteCrossConnectionInner object