if (!hasNext()) {
          throw new NoSuchElementException();
        }
        /*
         * requireNonNull is safe because our callers always pass non-null arguments. Each element
         * of the array becomes null only when we iterate past it and then clear it.
         */
        I result = requireNonNull(elements[index]);
        elements[index] = null;
        index++;
        return result;
      }
    };

    checkNotNull(ip);
    if (ip instanceof Inet4Address) {
      // For IPv4, Java's formatting is good enough.
      // requireNonNull accommodates Android's @RecentlyNullable annotation on getHostAddress
      return requireNonNull(ip.getHostAddress());
    }
    byte[] bytes = ip.getAddress();
    int[] hextets = new int[IPV6_PART_COUNT];
    for (int i = 0; i < hextets.length; i++) {

                prefix = prefix == null ? "" : prefix;
                namespaceUri = namespaceUri == null ? "" : namespaceUri;
                name = Objects.requireNonNull(name);
                attributes = ImmutableCollections.copy(attributes);
                children = ImmutableCollections.copy(children);
            }

            @Override

 *       recommend using our {@link VerifyException} exception type. Throwing a plain {@link
 *       RuntimeException} is frowned upon.
 *   <li>Use of {@link java.util.Objects#requireNonNull(Object)} is generally discouraged, since
 *       {@link #verifyNotNull(Object)} and {@link Preconditions#checkNotNull(Object)} perform the
 *       same function with more clarity.
 * </ul>
 *

       * https://github.com/typetools/checker-framework/issues/3030
       *
       * https://github.com/typetools/checker-framework/issues/3236
       */
      String key = (String) requireNonNull(e.nextElement());
      /*
       * requireNonNull is safe because the key came from propertyNames...
       *
       * ...except that it's possible for users to insert a string key with a non-string value, and

       * https://github.com/typetools/checker-framework/issues/3030
       *
       * https://github.com/typetools/checker-framework/issues/3236
       */
      String key = (String) requireNonNull(e.nextElement());
      /*
       * requireNonNull is safe because the key came from propertyNames...
       *
       * ...except that it's possible for users to insert a string key with a non-string value, and

        String artifactId = parent.getArtifactId();
        String version = parent.getVersion();

        ModelResolver modelResolver = request.getModelResolver();
        Objects.requireNonNull(
                modelResolver,
                String.format(
                        "request.modelResolver cannot be null (parent POM %s and POM %s)",

     *            information along, may be <code>null</code>.
     */
    public void merge(Model target, Model source, boolean sourceDominant, Map<?, ?> hints) {
        Objects.requireNonNull(target, "target cannot be null");

        if (source == null) {
            return;
        }

        Map<Object, Object> context = new HashMap<>();
        if (hints != null) {