org-export-replace-region-by
org-export-replace-region-by is an autoloaded Lisp function in `ox.el
'.
(org-export-replace-region-by BACKEND)
Replace the active region by its export to BACKEND.
BACKEND is either an export back-end, as returned by, e.g.,
`org-export-create-backend', or a symbol referring to
a registered back-end.