protected override bool OnJSSetProperty(JSObject obj, string propertyName, JSValue value)
{
GetBag(obj)[propertyName] = value;
return(true);
}
protected override bool OnJSSetProperty(JSObject obj, string propertyName, JSValue value)
{
throw new JSErrorException(obj.Context, "IllegalOperationError",
"Setting properties on this object is not allowed");
}