docs: function () {
                  this.$InputElement.initWidget.call(this);
  
                  var bindings = this._cfg.bind;
                  var binding = bindings.selectedValue;
                  if (binding) {
                      var newValue = this._transform(binding.transform, binding.inside[binding.to], "toWidget");
                      this._domElt.checked = (newValue === this._cfg.value);
                  } else {
                      this.$logWarn(this.BINDING_NEEDED, [this.$class, "selectedValue"]);
                  }
              }