code: public Observable<OpenShiftManagedClusterInner> createOrUpdateAsync(String resourceGroupName, String resourceName, OpenShiftManagedClusterInner parameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, resourceName, parameters).map(new Func1<ServiceResponse<OpenShiftManagedClusterInner>, OpenShiftManagedClusterInner>() {
              @Override
              public OpenShiftManagedClusterInner call(ServiceResponse<OpenShiftManagedClusterInner> response) {
                  return response.body();
              }
          });
      }
docs: Creates or updates an OpenShift managed cluster.
  Creates or updates a OpenShift managed cluster with the specified configuration for agents and OpenShift version.
  
  @param resourceGroupName The name of the resource group.
  @param resourceName The name of the OpenShift managed cluster resource.
  @param parameters Parameters supplied to the Create or Update an OpenShift Managed Cluster operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request