Extend RenameHandler to handle specific strings Follow

Consider the following simple example in the Mathematica plugin

The resolving of myFunction works like a charm and therefore, in place renaming does also. What I like to do is to extend the renaming to myFunction in the string. The important part is, that I want to ensure that I only replace it in ::usage definitions. Therefore, I cannot simply replace all myFunction in all strings. I need to visit all elements that are going to be renamed anyway and when one of them is a ::usage definition, I want to rename the attached string.

What is the simplest method to do this? Is there any way I can still leave the dirty work to the default RenameHandler and process all elements afterward?