(define-external identity msghandler)
(define-external make-error msghandler)
(define-external make-event msghandler)
(define-external make-reply msghandler)
(define-external reply-seq-nr msghandler)
(define-external error-seq-nr msghandler)
(define-external *event-queue* msghandler)
(define-external *error-queue* msghandler)
(define-external empty-error-queue msghandler)
(define-external x-error? msghandler)
(define-external x-event? msghandler)
(define-external x-reply? msghandler)

(define-external msg-handler msghandler)