code: public Observable<ExpressRouteCrossConnectionInner> createOrUpdateAsync(String resourceGroupName, String crossConnectionName, ExpressRouteCrossConnectionInner parameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, crossConnectionName, parameters).map(new Func1<ServiceResponse<ExpressRouteCrossConnectionInner>, ExpressRouteCrossConnectionInner>() {
              @Override
              public ExpressRouteCrossConnectionInner call(ServiceResponse<ExpressRouteCrossConnectionInner> response) {
                  return response.body();
              }
          });
      }
docs: Update the specified ExpressRouteCrossConnection.
  
  @param resourceGroupName The name of the resource group.
  @param crossConnectionName The name of the ExpressRouteCrossConnection.
  @param parameters Parameters supplied to the update express route crossConnection operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request