(define-key map "t" 'notmuch-search-filter-by-tag)
(define-key map "x" 'kill-this-buffer)
(define-key map (kbd "RET") 'notmuch-search-show-thread)
(define-key map "t" 'notmuch-search-filter-by-tag)
(define-key map "x" 'kill-this-buffer)
(define-key map (kbd "RET") 'notmuch-search-show-thread)