// flip GOLDEN_PRESENT_KEY to true even if it wasn't explicitly inserted
    // (false positive).
    assertThat(bloomFilter.mightContain(GOLDEN_PRESENT_KEY)).isFalse();
    for (int i = 0; i < NUM_PUTS; i++) {
      bloomFilter.put(getNonGoldenRandomKey());
    }
    bloomFilter.put(GOLDEN_PRESENT_KEY);

    int numThreads = 12;

    // flip GOLDEN_PRESENT_KEY to true even if it wasn't explicitly inserted
    // (false positive).
    assertThat(bloomFilter.mightContain(GOLDEN_PRESENT_KEY)).isFalse();
    for (int i = 0; i < NUM_PUTS; i++) {
      bloomFilter.put(getNonGoldenRandomKey());
    }
    bloomFilter.put(GOLDEN_PRESENT_KEY);

    int numThreads = 12;