@Override
    public <R> Traverser.Admin<R> split(final R r, final Step<T, R> step) {
        final O_OB_S_SE_SL_Traverser<R> clone = (O_OB_S_SE_SL_Traverser<R>) super.split(r, step);
        clone.sack = null == clone.sack ? null : null == clone.sideEffects.getSackSplitter() ? clone.sack : clone.sideEffects.getSackSplitter().apply(clone.sack);
        return clone;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/traverser/O_OB_S_SE_SL_Traverser.java