public static AnonymousTraversalSource<GraphTraversalSource> traversal() {
        return traversal(GraphTraversalSource.class);
    }
Constructs an {@code AnonymousTraversalSource} which will then be configured to spawn a
{@link GraphTraversalSource}.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/AnonymousTraversalSource.java