Configuration b = cb.build();
assertEquals(b.sites().allBackups().size(), 3);
BackupConfiguration b0 = b.sites().allBackups().get(0);
assertEquals(b0.site(), "LON");
assertEquals(b0.strategy(), BackupConfiguration.BackupStrategy.SYNC);
BackupConfiguration b1 = b.sites().allBackups().get(1);
assertEquals(b1.site(), "SFO");
assertEquals(b1.strategy(), BackupConfiguration.BackupStrategy.ASYNC);