3a5e1b57_erence_for_Creating_WoW_Addons__Description
[Flag] blizzardui [Description] 
This function is not a C API but a Lua function declared in Blizzard's default user interface. Its implementation can be viewed by extracting the addon data using the Addon Kit provided by Blizzard.
docs/api flags - World of Warcraft Programming: A Guide and Reference for Creating WoW Addons
Description