@Override
        public Set<MemoryComputeKey> getMemoryComputeKeys() {
            return Collections.singleton(MemoryComputeKey.of("", Operator.or, true, false));
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/computer/GraphComputerTest.java