vcl::Window Get/SetUniqueId - is it still needed?

Hello world, 

as it happens, I need to write a method of vcl::Window that will return its 
unique id. In most of the cases it'll be the same as its help id (i.e. 
path/to/ui/file/widget/within), but sometimes it won't. 

While writing it, I realized that such a method already exists. I tried to dig 
in git logs, but since most of the occurrences of Get/SetUniqueId uses can be 
attributed to the infamous 'initial commit', I didn't find much.

Questions for the more knowledgeable ones:

* What is vcl::Window Get/SetUniqueId good for and is it still needed 
nowadays, when most of the dialogs are not resource-based? 

* For some windows, argument of SetHelpId as well as SetUniqueId is the same 
(example:  sd/source/ui/view/drviewsa.cxx, DrawViewShell::Construct ). Isn't 
SetUniqueId call redundant in such case?

* For yet another windows that set their unique ID, this ID is referenced only 
in helpcontent2/helpers/help_hid.lst and nowhere else (i.e. in no .xhp file). 
Can such ids be dropped? What is help_hid.list used for anyway?

TIA for any helpful answers
-- 

Katarina Behrens

Softwareentwicklerin LibreOffice
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