(wl-folder-nmz-image . wl-nmz-folder-icon)
(wl-folder-shimbun-image . wl-shimbun-folder-icon)
(wl-folder-file-image . wl-file-folder-icon)
+ (wl-folder-access-image . wl-access-folder-icon)
(wl-folder-trash-empty-image . wl-empty-trash-folder-icon)
(wl-folder-draft-image . wl-draft-folder-icon)
(wl-folder-queue-image . wl-queue-folder-icon)