(define-key map "z" 'notmuch-tree)
(define-key map "m" 'notmuch-mua-new-mail)
(define-key map "=" 'notmuch-refresh-this-buffer)
(define-key map "z" 'notmuch-tree)
(define-key map "m" 'notmuch-mua-new-mail)
(define-key map "=" 'notmuch-refresh-this-buffer)