+/* Get a copy of the data in this message document.
+ *
+ * Caller should talloc_free the result when done.
+ *
+ * This function is intended to support database upgrade and really
+ * shouldn't be used otherwise. */
+char *
+_notmuch_message_talloc_copy_data (notmuch_message_t *message);
+
+/* Clear the data in this message document.
+ *
+ * This function is intended to support database upgrade and really
+ * shouldn't be used otherwise. */
+void
+_notmuch_message_clear_data (notmuch_message_t *message);
+
+/* Set the author member of 'message' - this is the representation used
+ * when displaying the message */
+void
+notmuch_message_set_author (notmuch_message_t *message, const char *author);
+
+/* Get the author member of 'message' */
+const char *
+notmuch_message_get_author (notmuch_message_t *message);
+
+