gistfile1.java

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    public GraphTraversal<Edge, Edge> start() {
        final TinkerEdge edge = this;
        final GraphTraversal<Edge, Edge> traversal = new DefaultGraphTraversal<Edge, Edge>() {
            public GraphTraversal<Edge, Edge> submit(final TraversalEngine engine) {
                if (engine instanceof GraphComputer) {
                    this.optimizers().unregister(TinkerGraphStepOptimizer.class);
                    final String label = this.getSteps().get(0).getAs();
                    TraversalHelper.removeStep(0, this);
                    final Step identityStep = new IdentityStep(this);
                    if (TraversalHelper.isLabeled(label))
                        identityStep.setAs(label);

                    TraversalHelper.insertStep(identityStep, 0, this);
                    TraversalHelper.insertStep(new HasStep(this, new HasContainer(Element.ID, Compare.EQUAL, edge.getId())), 0, this);
                    TraversalHelper.insertStep(new TinkerGraphStep<>(this, Edge.class, edge.graph), 0, this);
                }
                return super.submit(engine);
            }
        };
        return (GraphTraversal) traversal.addStep(new StartStep<>(traversal, this));
    }