mh-variant-set-variant

mh-variant-set-variant is a compiled Lisp function in `mh-e.el'.

(mh-variant-set-variant VARIANT)

Set up the system variables for the MH variant named VARIANT.
If VARIANT is a string, use that key in the alist returned by the
function `mh-variants'.
If VARIANT is a symbol, select the first entry that matches that
variant.