.build();
StorageKey key = new StorageKey(strategy);
key.replaceValues(Lists.<Object>newArrayList(
hash50.apply("green"), 2013, 9, 1, "green"));
Assert.assertEquals(Sets.newHashSet("number"),
c.minimizeFor(key).keySet());
// adjust the end time so that month is the last field checked
Constraints c2 = c.toBefore("created_at",