public List<Token> getTokens(int start, int stop, int ttype) {HashSet<Integer> s = new HashSet<Integer>(ttype);s.add(ttype);return getTokens(start,stop, s);}

public virtual IList<IToken> GetTokens(int start, int stop, int ttype){BitSet s = new BitSet(ttype);s.Set(ttype);return GetTokens(start, stop, s);}
