code: function(step, next) {
        if (step.options.data != null) {
          step.data = step.options.data;
        } else {
          step.data = {};
        }
        return next();
      }
docs: /*{"name":"ctrl.builders.data", "priority":5}
  This builder adds the `step.data` property allowing you to pass data
  between steps. Additionally, if `data` is passed into the options its
  contents will be available to the first step.