virtual stecoll *used_stes() const {
stecoll *x = e ? e->used_stes() : new stecoll;
stecoll *n = next ? next->used_stes() : new stecoll;
x->append(n);
return x;
}
virtual stecoll *used_stes() const
{
// NOTE: func is ignored
return (actuals ? actuals->used_stes() : new stecoll);
}