@Override
        public void execute(final Vertex vertex, final Messenger messenger, final Memory memory) {
            assertEquals(0, memory.getIteration());
            assertTrue(memory.isInitialIteration());
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/computer/GraphComputerTest.java