if (Grob *par = me->get_parent (X_AXIS))
{
Grob *stem = Note_column::get_stem (par);
if (stem && Stem::first_head (stem))
me->set_parent (Stem::first_head (stem), X_AXIS);
}
if (Grob *par = me->get_parent (X_AXIS))
{
Grob *stem = Note_column::get_stem (par);
if (stem && Stem::first_head (stem))
me->set_parent (Stem::first_head (stem), X_AXIS);
}