code: function InstallGetterSetter(object, name, getter, setter, attributes) {
    %CheckIsBootstrapping();
    if (IS_UNDEFINED(attributes)) attributes = DONT_ENUM;
    SetFunctionName(getter, name, "get");
    SetFunctionName(setter, name, "set");
    %FunctionRemovePrototype(getter);
    %FunctionRemovePrototype(setter);
    %DefineAccessorPropertyUnchecked(object, name, getter, setter, DONT_ENUM);
    %SetNativeFlag(getter);
    %SetNativeFlag(setter);
  }
docs: Helper function to install a getter/setter accessor property.