@Override
    protected Traverser.Admin<ComputerResult> processNextStart() throws NoSuchElementException {
        return super.processNextStart();
    }
@author Daniel Kuppitz (http://gremlin.guru)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/computer/traversal/step/map/ShortestPathVertexProgramStep.java