throws InterpretException {
String[] values;
String var = null;
HelperStringTokenizer tk = new HelperStringTokenizer(helpers);
//TODO tokenize in one time
String[] helper = tk.allTokens();
if (helper.length == 1) {
HelperStringTokenizer items = new HelperStringTokenizer(helper[0]);
items.splitComma(true);
values = items.allTokens();
Integer forindex = (Integer) interpreter.retraceVariable(LOOP_INDEX);