dataStoreParams.put("key4", "value4");
        assertTrue(dataStoreParams.containsKey("key4"));
        assertFalse(newParams.containsKey("key4"));
    }

    // Test asMap
    public void test_asMap() {
        dataStoreParams.put("key1", "value1");
        dataStoreParams.put("key2", 123);
        dataStoreParams.put("key3", null);

        Map<String, Object> map = dataStoreParams.asMap();

    Object three = new Object();
    cache.getUnchecked(three);
    assertEquals(1, cache.stats().hitCount());
    assertEquals(3, cache.stats().missCount());
  }

  // asMap tests

  public void testAsMap() {
    CacheBuilder<Object, Object> builder = createCacheBuilder();
    LocalLoadingCache<Object, Object> cache = makeCache(builder, identityLoader());
    assertEquals(EMPTY_STATS, cache.stats());