assertThat(map).isEmpty();
        assertThat(segment.valueReferenceQueue.poll()).isNull();
      }
    }
  }

  public void testNullParameters() throws Exception {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(makeLocalCache(createCacheBuilder()));
    CacheLoader<Object, Object> loader = identityLoader();

        assertThat(map).isEmpty();
        assertThat(segment.valueReferenceQueue.poll()).isNull();
      }
    }
  }

  public void testNullParameters() throws Exception {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(makeLocalCache(createCacheBuilder()));
    CacheLoader<Object, Object> loader = identityLoader();

     * implement Function<A, B>, as discussed in a class-level comment), it would make some sense to
     * perform runtime null checks on the input and output. (That would also make NullPointerTester
     * happy!) However, since we didn't do that for many years, we're not about to start now.
     * (Runtime checks could be particularly bad for users of LegacyConverter.)
     *