code: public ExpressRouteCrossConnectionInner createOrUpdate(String resourceGroupName, String crossConnectionName, ExpressRouteCrossConnectionInner parameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, crossConnectionName, parameters).toBlocking().last().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
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the ExpressRouteCrossConnectionInner object if successful.