@Override
    public Set<TraverserRequirement> getRequirements() {
        return this.getSelfAndChildRequirements(TraverserRequirement.OBJECT);
    }
Take the collection and apply modulators removing traversers that have modulators that aren't productive.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/OrderLocalStep.java