Function: mh-thread-message-p
mh-thread-message-p is a function defined in mh-thread.el.gz.
Signature
(mh-thread-message-p X)
Source Code
;; Defined in /usr/src/emacs/lisp/mh-e/mh-thread.el.gz
;; Could not find source code, showing raw function object.
#[(x) ((and (memq (type-of x) cl-struct-mh-thread-message-tags) t))
(cl-struct-mh-thread-message-tags)]