+/*EXTL_DOC
+ * Returns the group of \var{reg}, if it is managed by one,
+ * and \var{reg} itself otherwise.
+ */
+/*EXTL_EXPORT_MEMBER
+WRegion *region_group_of(WRegion *reg)
+{
+ WRegion *mgr=REGION_MANAGER(reg);
+
+ return (OBJ_IS(mgr, WGroup) ? mgr : reg);
+}*/
+
+
+/*EXTL_DOC
+ * Returns the group of \var{reg}, if \var{reg} is its bottom,
+ * and \var{reg} itself otherwise.
+ */
+EXTL_EXPORT_MEMBER
+WRegion *region_groupleader_of(WRegion *reg)