queries[i] = PRESENT;
      } else {
        queries[i] = ABSENT;
      }
    }
  }

  @Benchmark
  public boolean contains(int reps) {
    ImmutableSet<?>[] sets = this.sets;
    Object[] queries = this.queries;
    boolean result = false;
    for (int i = 0; i < reps; i++) {
      int j = i & 0xFFF;
      result ^= sets[j].contains(queries[j]);
    }
    return result;
  }

        queries[i] = PRESENT;
      } else {
        queries[i] = ABSENT;
      }
    }
  }

  @Benchmark
  public boolean contains(int reps) {
    ImmutableSet<?>[] sets = this.sets;
    Object[] queries = this.queries;
    boolean result = false;
    for (int i = 0; i < reps; i++) {
      int j = i & 0xFFF;
      result ^= sets[j].contains(queries[j]);
    }
    return result;
  }