XmMultiListSelectAllItems(3) on Linux
The text 7f89f74b0895, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
an MultiList function that selects all rows of the list "XmMultiListSelectAllItems" "MultiList functions" "XmMultiListSelectAllItems"