code: protected void registerAddOperation(final ManagementResourceRegistration registration, final AbstractAddStepHandler handler,
                                          OperationEntry.Flag... flags) {
          registration.registerOperationHandler(getOperationDefinition(ModelDescriptionConstants.ADD,
                  new DefaultResourceAddDescriptionProvider(registration, descriptionResolver, orderedChild), OperationEntry.EntryType.PUBLIC, flags)
                  , handler);
      }
docs: Registers add operation
  <p/>
  Registers add operation
  
  @param registration resource on which to register
  @param handler      operation handler to register
  @param flags        with flags