code: public Observable<SignalRResourceInner> createOrUpdateAsync(String resourceGroupName, String resourceName, SignalRCreateParameters parameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, resourceName, parameters).map(new Func1<ServiceResponse<SignalRResourceInner>, SignalRResourceInner>() {
              @Override
              public SignalRResourceInner call(ServiceResponse<SignalRResourceInner> response) {
                  return response.body();
              }
          });
      }
docs: Create a new SignalR service and update an exiting SignalR service.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param resourceName The name of the SignalR resource.
  @param parameters Parameters for the create or update operation
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request