private ArrayProperties buildArrayProperties() throws MethodIsBlockingException {
ObjectProperties loadedProperties = getLoadedProperties();
final TreeMap<Integer, JsVariable> map = new TreeMap<Integer, JsVariable>();
JsValue lengthValue = null;
for (JsVariable variable : loadedProperties.properties()) {
String name = variable.getName();
if (WipExpressionBuilder.ALL_DIGITS.matcher(name).matches()) {
Integer number = Integer.valueOf(name);
map.put(number, variable);
} else if ("length".equals(name)) {