public <T> Traverser<T> generateTraverser(final T value) {
            return traversal.getTraverserGenerator().generate(value, step, 1l);
        }
Context information for service call invocation. Useful for Barrier services that want to produce their own
Traversers that maintain path information.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/service/Service.java