code: protected final FluentModelTImpl prepareIndependentDefine(FluentModelTImpl model) {
          model.setPendingOperation(ExternalChildResourceImpl.PendingOperation.ToBeCreated);
          return model;
      }
docs: Prepare the given model of an external child resource for independent definition (without the parent context).
  
  @param model the model to prepare for independent create definition
  @return the external child resource prepared for create