code: function (fnName, args) {
              var func;
              var ancestor = this;
              var isFunc = isFunction(fnName);
              while (ancestor.parentView) {
                  ancestor = ancestor.parentView;
                  if (ancestor) {
                      func = isFunc ? fnName : ancestor[fnName];
                      func.apply(ancestor, args);
                  }
              }
              return this;
          }
docs: Invoke a function or method on ancestors
  @memberOf Backbone.BaseView#
  @param {Function|String} fnName
  @param {mixed[]} [args]
  An array of arguments to pass to
  the invocation
  @return {Backbone.BaseView}