// append(s);
// append(PAR_CLOSE);
// return false;
// }
if (s instanceof RutaBinaryArithmeticExpression) {
RutaBinaryArithmeticExpression ba = (RutaBinaryArithmeticExpression) s;
String operator = ba.getOperator();
append(operator);
append(PAR_OPEN);
traverseAstNodes(ba.getChilds());
append(PAR_CLOSE);
}
append(s);
return false;
}