public static TraversalEngine.Type setTraversalEngineType(final TraversalEngine.Type traversalEngine) {
        final TraversalEngine.Type old = GraphManager.traversalEngineType;
        GraphManager.traversalEngineType = traversalEngine;
        return old;
    }
Gets the {@link GraphProvider} from the current test suite and wraps it in a {@link ManagedGraphProvider}.
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/GraphManager.java