RITM variables to summary

var answer = '';
var varLabel;
var varValue;
var arrUtil = new ArrayUtil();
var set = new GlideappVariablePoolQuestionSet();
set.setRequestID(current.getUniqueValue()); set.load();
var vs = set.getFlatQuestions();
for (var i=0; i < vs.size(); i++){
    varLabel = vs.get(i).getLabel(); //get label of variable
    varValue = vs.get(i).getDisplayValue(); //get display value of variable
    if(varValue != '' && varValue != 'false' && varLabel != null){ //value is not empty or false and label is not NULL
        answer +=(varLabel + " = " + varValue + "\n");
    }
}

current.u_summary = answer;
current.update();