Function: TeX-arg-define-index
TeX-arg-define-index is a function alias for TeX-arg-index, defined in
latex.el.
Signature
(TeX-arg-define-index OPTIONAL &optional PROMPT &rest ARGS)
Documentation
Prompt for an index entry completing with known entries.
If OPTIONAL is non-nil, insert the resulting value as an optional argument, otherwise as a mandatory one. Use PROMPT as the prompt string. ARGS is unused.