code: function (modifierName, out) {
                  var modifier = __modifiers[modifierName];
                  if (modifier && modifier.init) {
                      modifier.init(out);
                  }
              }
docs: call the init function of a modifier object if it exists. This is done when the template is processed.
  @param {String} modifierName
  @param {aria.templates.ClassWriter} out