+extern WRegion *region_attach_load_helper(WRegion *mgr,
+ WWindow *par, const WFitParams *fp,
+ WRegionDoAttachFn *fn, void *fn_param,
+ ExtlTab tab, WPHolder **sm_ph);
+
+extern bool region_ancestor_check(WRegion *dst, WRegion *reg);
+
+extern void region_postdetach_dispose(WRegion *reg, WRegion *disposeroot);