How to fine qualified calls in SYNTAX_UPDATER_VISITOR ?

[Jimmy Johnson]

Manu,

Given a construct such as:

if (x.f) or (y.f) then

    a.f

    c := b.f

end

I want to "update" the text so that there is new text after the line "a.f" but I want to keep the other text as is.  IOW, I want to insert new text after a qualified feature call, but only when used as a statement not as an expression.  Perhaps said another way, I want to insert code after a command but not after a query.

I think I need to ignore if statement conditions, check instructions completely, object attachment tests, loop conditions, & perhaps others; but I do not understand which xxx_AS to use or where to put it.  I can follow the code of the SYNTAX_UPDATER_VISITOR and how it modifies text with calls to "context.add_string".

Thanks for your help

jjj