vc-toggle-read-only
vc-toggle-read-only is an alias for `toggle-read-only' in `vc-hooks.el
'.
(vc-toggle-read-only &optional ARG INTERACTIVE)
This function is obsolete since 24.1;
use `read-only-mode' instead (or `toggle-read-only' in older versions of Emacs).
Change whether this buffer is read-only.