How customize the value that is shown in Qtcreator debugger

[Meai]

I have a custom string library that I'm using which stores the raw char* somewhere deeply nested like this for example:

str4.store.data.

In the debugger I constantly have to expand to that "data" variable in order to see what the char* looks like.
Is there a way to create a permanent shortcut expression for all objects of this type?