private <T> Traverser.Admin<T> makeTraverser(final T val, final long bulk) {
        return new B_O_Traverser<>(val, bulk).asAdmin();
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/traverser/util/TraverserSetImplementationTest.java