https://manpages.ubuntu.com/manpages/xenial/man3/XmVaCreateManagedOutline.3.html
Ubuntu Manpage: XmVaCreateOutline, XmVaCreateManagedOutline - A Outline widget convenience creation...
A Outline widget convenience creation functions. "XmVaCreateOutline" "XmVaCreateManagedOutline" "creation functions"
ubuntumanpageoutlinewidgetconvenience