private void checkListOfNames(Collection<String> names) {
        assertEquals(6, names.size());
        assertTrue(names.contains("marko"));
        assertTrue(names.contains("josh"));
        assertTrue(names.contains("peter"));
        assertTrue(names.contains("lop"));
        assertTrue(names.contains("vadas"));
        assertTrue(names.contains("ripple"));
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/sideEffect/AggregateTest.java