code: function(req) {
  
      // Ensure a model can be deduced from the request options.
      var model = req.options.model || req.options.controller;
      if (!model) {
        throw new Error('No "model" specified in route options.');
      }
  
      var Model = req._sails.models[model];
      if (!Model) {
        throw new Error('Invalid route option, "model". No model named: ' + model);
      }
  
      return Model;
    }
docs: Determine the model class to use w/ this blueprint action.
  @param  {Request} req
  @return {WLCollection}