* elmo.el (elmo-message-copy-entity): New function.

* elmo.el (elmo-message-copy-entity): New function.
(elmo-message-entity-set-number): Ditto.
(elmo-message-mark): Define as method.

* elmo-multi.el (elmo-multi-real-folder-number): Changed position.
(elmo-folder-synchronize): Return 0 (Should be reconsider).
(elmo-message-entity): Fixed last change.
(elmo-message-mark): Define.
(elmo-folder-msgdb-create): Abolish.
(elmo-multi-folder-append-msgdb): Ditto.
(elmo-multi-folder-diff): Fixed.
(elmo-multi-split-number-alist): Removed.
(elmo-multi-split-mark-alist): Removed.
(elmo-folder-list-messages): Define.
(elmo-folder-list-messages-internal): Removed.

* wl-thread.el (wl-thread-update-line-on-buffer-sub): Don't use
elmo-msgdb interface.
(wl-thread-get-exist-children): Likewise.
(wl-thread-insert-message): Likewise.
(wl-thread-msg-mark-as-important): Likewise.
(wl-thread-insert-entity-sub): Likewise.
(wl-thread-get-children-msgs-uncached): Likewise.

* wl-summary.el (wl-summary-sync-all-init): Use elmo-folder-length.
(wl-summary-prefetch-msg): Don't use elmo-msgdb interface.
(wl-summary-sync-update): Likewise.
(wl-summary-auto-select-msg-p): Likewise.
(wl-summary-update-thread): Likewise.
(wl-summary-mark-as-important): Likewise.
(wl-summary-jump-to-msg-internal): Likewise.
(wl-summary-redisplay-internal): Likewise.
(wl-summary-print-message-with-ps-print): Likewise.
(wl-summary-folder-info-update): Likewise.

* wl-folder.el (wl-folder-check-one-entity):
elmo-folder-count-flags instead of wl-summary-count-unread.