How to get NameMapping object with This or Self keywords?

Precondition:

I have bellow elements ODT.Class  ElementActions with code

function SetValue(obj, text){
obj.Keys(text + "[Enter]")
}

And ODT.Data.Application.CustomerName element it has type of ElementActions class, so I can use  SetValue method

Also it has method GetObject with code

function CustomeTextField(){
return NameMapping.Sys.Orders.OrderForm.Group.Customer
}

My test:

function start (){

ODT.Data.Application.OrderScreen.CustomerName.SetValue(ODT.Data.Application.OrderScreen.CustomerName.GetObject(), "Text")
 }

Here will be useful to get object without repeating

ODT.Data.Application.OrderScreen.CustomerName.GetObject()

 code in signature, so my question is How can we do it?

I read some article about This or Self keywords, but I’m not sure that it can help me to deal with it (https://support.smartbear.com/viewarticle/72522/)