+/**
+ * modest_window_mgr_unregister_header
+ * @self: a #ModestWindowMgr
+ * @header: a valid #TnyHeader
+ *
+ * unregister the uid. We could need to do that if there is any error
+ * retrieving a message. In that case the window will not be
+ * registered and thus the header will not be removed, so we must do
+ * it manually
+ **/
+void modest_window_mgr_unregister_header (ModestWindowMgr *self, TnyHeader *header);