/**
* gets the requested values from the Has step. If it's a single value, wrap it in an array,
* otherwise return the array
*/
private Optional<Pair<String, Iterator<Object>>> getValuePair(HasContainer c) {
Iterator<Object> values;
if (c.getPredicate().getBiPredicate() == Contains.within)
values = ((Iterable<Object>) c.getValue()).iterator();
else values = IteratorUtils.of(c.getValue());
return Optional.of(new Pair<>(c.getKey(), values));
}
