@Override
    public void vertexRemoved(final Vertex vertex) {
        System.out.println("Vertex [" + vertex.toString() + "] removed from graph [" + graph.toString() + "]");
    }
An example listener that writes a message to the console for each event that fires from the graph.

@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/util/event/ConsoleMutationListener.java