code: function(attrName, model) {
        return (model.labels && model.labels[attrName]) || defaultLabelFormatters.sentenceCase(attrName, model);
      }
docs: Looks for a label configured on the model and returns it  var Model = Backbone.Model.extend({ validation: { someAttribute: { required: true } },  labels: { someAttribute: 'Custom label' } });