@Override
    public Predicate process(Predicate predicate, PredicateOptions options) {
        processPredicate(predicate, options);
        return predicate;
    }
Partitions all the feature ranges according to the arity and bounds
set in the PredicateOptions, and updates the ranges with a set of
partitions and edge partitions.
This is required to be able to store a range in the PredicateIndex.

@author Magnar Nedland
@author bjorncs
predicate-search-core/src/main/java/com/yahoo/search/predicate/optimization/ComplexNodeTransformer.java