public IntervalSet or(IntSet a) {IntervalSet o = new IntervalSet();o.addAll(this);o.addAll(a);return o;}

public virtual Antlr4.Runtime.Misc.IntervalSet Or(IIntSet a){Antlr4.Runtime.Misc.IntervalSet o = new Antlr4.Runtime.Misc.IntervalSet();o.AddAll(this);o.AddAll(a);return o;}
