// but types are typically only Comparable to themselves).
  @SuppressWarnings({"rawtypes", "unchecked"})
  private static MultimapBuilderWithKeys<Comparable<?>> rawtypeToWildcard(
      MultimapBuilderWithKeys<Comparable> treeKeys) {
    return (MultimapBuilderWithKeys) treeKeys;
  }

  @SuppressWarnings({"rawtypes", "unchecked"})
  private static <K extends @Nullable Object>

      return this;
    } else {
      return new SubRangeMap(subRange);
    }
  }

  @SuppressWarnings("unchecked")
  private RangeMap<K, V> emptySubRangeMap() {
    return (RangeMap<K, V>) (RangeMap<?, ?>) EMPTY_SUB_RANGE_MAP;
  }

  @SuppressWarnings("ConstantCaseForConstants") // This RangeMap is immutable.
  private static final RangeMap<Comparable<?>, Object> EMPTY_SUB_RANGE_MAP =

        // Test ArrayList
        final List<String> list = new ArrayList<>();
        list.add("item1");
        list.add("item2");
        binary = SerializeUtil.fromObjectToBinary(list);
        @SuppressWarnings("unchecked")
        final List<String> resultList = (List<String>) SerializeUtil.fromBinaryToObject(binary);
        assertEquals(list.size(), resultList.size());
        assertEquals(list.get(0), resultList.get(0));

         * themselves null), so we can treat it as a plain `Object[]`.
         */
        @SuppressWarnings("nullness")
        Object[] result = standardToArray();
        return result;
      }

      @Override
      @SuppressWarnings("nullness") // b/192354773 in our checker affects toArray declarations
      public <T extends @Nullable Object> T[] toArray(T[] array) {

    return result;
  }

  @SuppressWarnings("rawtypes") // class literals
  static final List<? extends Class<? extends AbstractTester>> TESTERS =
      asList(
          ConcurrentMapPutIfAbsentTester.class,
          ConcurrentMapRemoveTester.class,
          ConcurrentMapReplaceTester.class,
          ConcurrentMapReplaceEntryTester.class);

  @SuppressWarnings("rawtypes") // class literals
  @Override

    return result;
  }

  @SuppressWarnings("rawtypes") // class literals
  static final List<? extends Class<? extends AbstractTester>> TESTERS =
      asList(
          ConcurrentMapPutIfAbsentTester.class,
          ConcurrentMapRemoveTester.class,
          ConcurrentMapReplaceTester.class,
          ConcurrentMapReplaceEntryTester.class);

  @SuppressWarnings("rawtypes") // class literals
  @Override

   * advantage of <a
   * href="https://docs.oracle.com/javase/tutorial/java/generics/genTypeInference.html#type-inference-instantiation">"diamond"
   * syntax</a>.
   */
  @SuppressWarnings("NonApiType") // acts as a direct substitute for a constructor call
  public static <E extends @Nullable Object> ArrayList<E> newArrayList() {
    return new ArrayList<>();
  }

  /**

        };

    assertThat(loadCount.get()).isEqualTo(0);
    assertThat(reloadCount.get()).isEqualTo(0);
    assertThat(loadAllCount.get()).isEqualTo(0);

    Object unused1 = baseLoader.load(new Object());
    @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored
    Future<?> possiblyIgnoredError = baseLoader.reload(new Object(), new Object());

@NullUnmarked
public class AbstractBiMapTest extends TestCase {

  // The next two tests verify that map entries are not accessed after they're
  // removed, since IdentityHashMap throws an exception when that occurs.
  @SuppressWarnings("IdentityHashMapBoxing") // explicitly testing IdentityHashMap
  public void testIdentityKeySetIteratorRemove() {
    BiMap<Integer, String> bimap =
        new AbstractBiMap<Integer, String>(

@NullUnmarked
public class AbstractBiMapTest extends TestCase {

  // The next two tests verify that map entries are not accessed after they're
  // removed, since IdentityHashMap throws an exception when that occurs.
  @SuppressWarnings("IdentityHashMapBoxing") // explicitly testing IdentityHashMap
  public void testIdentityKeySetIteratorRemove() {
    BiMap<Integer, String> bimap =
        new AbstractBiMap<Integer, String>(