XmTextFieldGetBaseline(3) on Linux
The text e2d6da93a206, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A TextField function that accesses the y position of the baseline "XmTextFieldGetBaseline" "TextField functions" "XmTextFieldGetBaseline"