addNodeInternal(node);
    return true;
  }

  /**
   * Adds {@code node} to the graph and returns the associated {@link GraphConnections}.
   *
   * @throws IllegalStateException if {@code node} is already present
   */
  @CanIgnoreReturnValue
  private GraphConnections<N, V> addNodeInternal(N node) {
    GraphConnections<N, V> connections = newConnections();
    checkState(nodeConnections.put(node, connections) == null);

   * {@code null} if this multiset is empty.
   */
  @Nullable Entry<E> pollLastEntry();

  /**
   * Returns a {@link NavigableSet} view of the distinct elements in this multiset.
   *
   * @since 14.0 (present with return type {@code SortedSet} since 11.0)
   */
  @Override
  NavigableSet<E> elementSet();

  /**
   * {@inheritDoc}
   *

   * {@code null} if this multiset is empty.
   */
  @Nullable Entry<E> pollLastEntry();

  /**
   * Returns a {@link NavigableSet} view of the distinct elements in this multiset.
   *
   * @since 14.0 (present with return type {@code SortedSet} since 11.0)
   */
  @Override
  NavigableSet<E> elementSet();

  /**
   * {@inheritDoc}
   *

		if isETagEqual(objInfo.ETag, ifNoneMatchETagHeader) {
			// Do not care If-Modified-Since, Because:
			// 1. If If-Modified-Since condition evaluates to true.
			//  If both of the If-None-Match and If-Modified-Since headers are present in the request as follows:
			// 	If-None-Match condition evaluates to false , and;
			//  If-Modified-Since condition evaluates to true ;
			// 	Then Amazon S3 returns the 304 Not Modified response code.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Maven G level metadata generator.
 * <p>
 * Plugin metadata contains G level list of "prefix" to A mapping for plugins present under this G.
 *
 * @deprecated since 4.0.0, use {@code maven-api-impl} jar instead
 */
@Deprecated(since = "4.0.0")
class PluginsMetadataGenerator implements MetadataGenerator {

    cache.put(3, 20);
    cache.put(6, 2);
    cache.put(98, 45);
    cache.put(56, 76);
    cache.put(23, 84);

    // Replace the two present elements.
    cache.put(23, 20);
    cache.put(56, 49);
    cache.put(23, 2);
    cache.put(56, 4);

    // Expire the two present elements.
    fakeTicker.advance(1001, MILLISECONDS);

    Integer unused1 = cache.getIfPresent(23);

        // Decode the token to verify its properties
        Type1Message type1Message = new Type1Message(type1Token);
        // Type1Message ORs default flags with provided flags; ensure expected bits are present
        assertTrue((type1Message.getFlags() & context.ntlmsspFlags) == context.ntlmsspFlags);
        assertEquals(domain, type1Message.getSuppliedDomain());
    }

    @Test

        }

        Xpp3Dom reportPlugins = configuration.getChild("reportPlugins");

        if (reportPlugins != null) {
            // new-style report configuration already present: warn since this new style has been deprecated
            // in favor of classical reporting section MSITE-647 / MSITE-684
            problems.add(new ModelProblemCollectorRequest(Severity.WARNING, Version.BASE)

     * have the same nullness as E." Since we can't, we declare it to return nullable elements, and
     * we can override it in our non-null-guaranteeing subtypes to present a better signature to
     * their users.
     *
     * However, the checker *we* use has this special knowledge about `Collection.toArray()` anyway,

            int offset = dstIndex + 8;

            // Write name if present
            if (name != null && name.length > 0) {
                System.arraycopy(name, 0, dst, offset, name.length);
                offset += name.length;
            }

            // Write data if present
            if (data != null && data.length > 0) {
                System.arraycopy(data, 0, dst, offset, data.length);