(add-to-invisibility-spec invis-spec)
(overlay-put overlay 'invisible (list invis-spec message-invis-spec))
(overlay-put overlay 'isearch-open-invisible #'notmuch-wash-region-isearch-show)
+ (overlay-put overlay 'priority 10)
(overlay-put overlay 'type type)
(goto-char (1+ end))
(save-excursion