@Override
    public void setGraph(final Graph graph) {
        if (null != this.bypassTraversal)
            this.bypassTraversal.setGraph(graph);

    }
Implementations of this class can never be a root-level traversal as they are specialized implementations
intended to be child traversals by design.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/lambda/AbstractLambdaTraversal.java