@Override
    public void workerIterationStart(final Memory memory) {
        // start collecting profile metrics
        if (this.profile) {
            this.iterationMetrics = new MutableMetrics("iteration" + memory.getIteration(), "Worker Iteration " + memory.getIteration());
            this.iterationMetrics.start();
        }
    }
Get the {@link PureTraversal} associated with the current instance of the {@link TraversalVertexProgram}.

@return the pure traversal of the instantiated program
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/computer/traversal/TraversalVertexProgram.java