public UserFunction CreateFunction(Scope scope, Lambda lambda)
{
var obj = new UserFunction(scope, lambda);
var protoObj = ObjectConstructor.Construct();
protoObj.SetOwnProperty("constructor", obj);
obj.Context = this;
obj.Class = ObjClass.Function;
obj.Prototype = FunctionConstructor.Function_prototype;
obj.SetOwnProperty("prototype", protoObj);
return obj;
}