Zero touch node return an enum field

Hi,

I try to make a zero touch node which return one field of an enum.It works fine but it make another nodes for all fields in the enum (see example).
Ex:
public static TabControlAction SelectedAction()
{
return TabControlAction.Selected;
}
i get a SelectAction node + all nodes of the all fields

can anybody help me to avoid that

Regards,

H.Moussa