code: public Observable<Void> beginEnableMonitoringAsync(String resourceGroupName, String clusterName, ClusterMonitoringRequest parameters) {
          return beginEnableMonitoringWithServiceResponseAsync(resourceGroupName, clusterName, parameters).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Enables the Operations Management Suite (OMS) on the HDInsight cluster.
  
  @param resourceGroupName The name of the resource group.
  @param clusterName The name of the cluster.
  @param parameters The Operations Management Suite (OMS) workspace parameters.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.