Where is the code of GameTooltip:AddLine()?
 

I am trying to grep the extracted Blizzard Interface Code for the definitions of GameTooltip:AddLine() or GameTooltip:AddDoubleLine(). Without success. Where are these defined, please? Thanks!

EDIT: Add GameTooltip:ClearLines(), GameTooltip:GetItem(), GameTooltip:SetBagItem(),... to that list.

None of them are defined in Lua. Many functions and most widgets are defined on the C++ side of the code, which is not accessible to players, even in datamined files.

Oh, I see. Thanks!