XmHierarchyOpenAllAncestors(3) on Linux
The text cac70da3dd07, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A Hierarchy function that opens all ancestors of the Hierarchy "XmListAddItem" "List functions" "XmListAddItem"