migemoのキーバインディング

  (defun migemo-register-isearch-keybinding ()
    (define-key isearch-mode-map "\C-d" 'migemo-isearch-yank-char)
    (define-key isearch-mode-map "\C-w" 'migemo-isearch-yank-word)
    (define-key isearch-mode-map "\C-y" 'migemo-isearch-yank-line)
    (define-key isearch-mode-map "\M-m" 'migemo-isearch-toggle-migemo))

これで全部、これしかない。M-m が押しにくい。C-mはダメだし。