'mime-view-plain-text-preview-hook was renamed to
'mime-preview-text/plain-hook.
+*** Variable
+
+ Variable 'mime-view-childrens-header-showing-Content-Type-list was
+abolished. Please use 'mime-preview-condition instead.
+
+*** API about visible-predicates were abolished
+
+ Following functions were abolished:
+
+ mime-view-header-visible-p (entity message-info)
+
+ mime-view-body-visible-p (entity message-info)
+
+ mime-view-entity-separator-visible-p (entity message-info)
+
+Please use 'mime-preview-condition instead.
+
+ Function 'mime-view-entity-button-visible-p is not abolished, but it
+is obsoleted.
+
+*** mime-preview-condition
+
+ Following are added as pre-defined keys:
+
+ 'childrens-situation default preview-situation for children
+ 'message-button to specify to display message-button
+ nil: default (invisible)
+ 'visible: visible
+ 'invisible: invisible
+ 'entity-button to specify to display entity-button
+ nil: default (visible)
+ 'visible: visible
+ 'invisible: invisible
+ 'header to specify to display header
+ nil: default (invisible)
+ 'visible: visible
+ 'invisible: invisible
** API