code: @Override
  	public T visitAnonExprTokens2(AnonExprTokens2Context ctx) {
  		//on(ctx);
  		T res = super.visitAnonExprTokens2(ctx);
  		appendAst(ctx, tok(SEQUENCE));
  		appendAst(ctx, tok(CHARACTERS));
  		appendAst(ctx, tok(UriSpecParser.URI_CHARS, ""));
  		return res;
  	}
docs: //-> sequence* ^(SEQUENCE ^(CHARACTERS URI_CHARS[""]))