code: public Observable<ServerAutomaticTuningInner> updateAsync(String resourceGroupName, String serverName, ServerAutomaticTuningInner parameters) {
          return updateWithServiceResponseAsync(resourceGroupName, serverName, parameters).map(new Func1<ServiceResponse<ServerAutomaticTuningInner>, ServerAutomaticTuningInner>() {
              @Override
              public ServerAutomaticTuningInner call(ServiceResponse<ServerAutomaticTuningInner> response) {
                  return response.body();
              }
          });
      }
docs: Update automatic tuning options on server.
  
  @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 serverName The name of the server.
  @param parameters The requested automatic tuning resource state.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ServerAutomaticTuningInner object