code: @Override
  	public T visitAnonExprTokens3(AnonExprTokens3Context ctx) {
  //		on(ctx);
  		appendAst(ctx, tok(SEQUENCE));
  		appendAst(ctx, tok(CHARACTERS));
  		appendAst(ctx, tok(UriSpecParser.URI_CHARS, ""));
  		T res = super.visitAnonExprTokens3(ctx);
  		return res;
  	}
docs: //-> ^(SEQUENCE ^(CHARACTERS URI_CHARS[""])) sequence*