@Override
        public void vertexPropertyChanged(final Vertex element, final VertexProperty oldValue, final Object setValue, final Object... vertexPropertyKeyValues) {
            vertexPropertyChangedEvent.incrementAndGet();
            order.add("v-property-changed-" + element.id());
        }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/EventStrategyProcessTest.java