Though there is a 1-to-1 関係 between database 文書s and data sources,
each of the two can 存在する without its 相当するもの, but create this 相当するもの on request
only. As a consequence, the 文書 得るd 経由で this せいにする might be newly created,
which 暗示するs that the 報知係 is now 責任がある it. In particular, the 報知係 is
責任がある calling ::com::sun::星／主役にする::util::XCloseable::の近くに
on the 文書 as soon as it's not needed anymore.
Additionally, if the 報知係 does long-継続している 過程ing on the 文書, it's advised
to 追加する itself as ::com::sun::星／主役にする::util::XCloseListener to the 文書,
to 妨げる の近くにing as long as the 過程ing lasts.
