@Override
        public void edgeAdded(final Edge edge) {
            addEdgeEvent.incrementAndGet();
            order.add("e-added-" + edge.id());
        }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/EventStrategyProcessTest.java