+(defun notmuch-show-markup-body (depth match btn)
+ "Markup a message body, (indenting, buttonizing citations,
+etc.), and conditionally hiding the body itself if the message
+has been read and does not match the current search.
+
+DEPTH specifies the depth at which this message appears in the
+tree of the current thread, (the top-level messages have depth 0
+and each reply increases depth by 1). MATCH indicates whether
+this message is regarded as matching the current search. BTN is
+the button which is used to toggle the visibility of this
+message.
+
+When this function is called, point must be within the message, but
+before the delimiter marking the beginning of the body."