code: function thng(id) {
  
      // To create nested Resources, the collection itself needs
      // a resource.
      if(!this.resource) {
        throw new Error('This Entity does not have a Resource.');
      }
  
      var path = this.resource.path + '/thngs';
  
      return Resource.constructorFactory(path, EVT.Entity.Thng)
        .call(this.resource.scope, id);
    }
docs: Custom nested resource constructor for Thngs of a Collection.