@Override
    protected Traverser.Admin<S> processNextStart() {
        final Traverser.Admin<S> traverser = this.starts.next();
        this.sideEffect(traverser);
        return traverser;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/sideEffect/SideEffectStep.java