// safely limiting the kinds of caches this can produce
    @SuppressWarnings("unchecked")
    CacheBuilder<K1, V1> me = (CacheBuilder<K1, V1>) this;
    me.removalListener = checkNotNull(listener);
    return me;
  }

  // Make a safe contravariant cast now so we don't have to do it over and over.
  @SuppressWarnings("unchecked")
  <K1 extends K, V1 extends V> RemovalListener<K1, V1> getRemovalListener() {

      for (T element : initialContents) {
        queue.offer(element);
      }
      return queue;
    }

    @SuppressWarnings("unchecked") // safe "contravariant cast"
    private <T extends B> Ordering<T> ordering() {
      return Ordering.from((Comparator<T>) comparator);
    }
  }

  private final Heap minHeap;
  private final Heap maxHeap;

    // type.
    checkNotNull(enumClass);
    checkNotNull(policy);
    @SuppressWarnings("unchecked")
    Map<E, LockGraphNode> lockGraphNodes = (Map<E, LockGraphNode>) getOrCreateNodes(enumClass);
    return new WithExplicitOrdering<>(policy, lockGraphNodes);
  }

  @SuppressWarnings("unchecked")
  private static <E extends Enum<E>> Map<? extends E, LockGraphNode> getOrCreateNodes(
      Class<E> clazz) {

        this.isDataFromNodeStatus = true;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.Address#unwrap(java.lang.Class)
     */
    @SuppressWarnings("unchecked")
    @Override
    public <T extends Address> T unwrap(final Class<T> type) {
        if (type.isAssignableFrom(this.getClass())) {
            return (T) this;
        }
        return null;
    }

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Test ComparableVersion.
 */
@SuppressWarnings("unchecked")
class ComparableVersionTest {
    private ComparableVersion newComparable(String version) {
        ComparableVersion ret = new ComparableVersion(version);
        String canonical = ret.getCanonical();

     *
     * @param session the HTTP session
     * @return the result document IDs cache map
     */
    private Map<String, String[]> getResultDocIdsCache(final HttpSession session) {
        @SuppressWarnings("unchecked")
        Map<String, String[]> resultDocIdsCache = (Map<String, String[]>) session.getAttribute(Constants.RESULT_DOC_ID_CACHE);
        if (resultDocIdsCache == null) {

    }

    /**
     * Get values from array index.
     * @param index Index
     * @param type Type
     * @param key Key
     * @return Values
     */
    @SuppressWarnings("unchecked")
    protected Map<String, Object>[] getFromArrayIndex(final String index, final String type, final String key) {
        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {

    //                                                                          Validation
    //                                                                          ==========
    @SuppressWarnings("unchecked")
    /**
     * Creates a validator instance for form validation.
     * This method uses the system helper to create a validator with Fess-specific messages.
     *
     * @return a new action validator instance

public class UnmodifiableCollectionTests {

  public static void assertMapEntryIsUnmodifiable(Entry<?, ?> entry) {
    try {
      // fine because the call is going to fail without modifying the entry
      @SuppressWarnings("unchecked")
      Entry<?, @Nullable Object> nullableValueEntry = (Entry<?, @Nullable Object>) entry;
      nullableValueEntry.setValue(null);
      fail("setValue on unmodifiable Map.Entry succeeded");

   *
   * <p>This is equivalent to {@code Stream.of(streams).flatMap(stream -> stream)}, but the returned
   * stream may perform better.
   *
   * @see Stream#concat(Stream, Stream)
   */
  @SuppressWarnings("unchecked") // could probably be avoided with a forwarding Spliterator
  @SafeVarargs
  public static <T extends @Nullable Object> Stream<T> concat(Stream<? extends T>... streams) {