def model_with_associations(name)
      model = created_model(name)
      return nil unless model
      OData::PickleAdapter.get_model(model.class, model.id, true)
    end
def model_with_associations(name)
      model = created_model(name)
      return nil unless model
      OData::PickleAdapter.get_model(model.class, model.id, true)
    end
return a newly selected model with the navigation properties expanded