Iterator<? extends Iterator<? extends T>> inputs) {
    return new ConcatenatedIterator<>(inputs);
  }

  /** Concats a varargs array of iterators without making a defensive copy of the array. */
  static <T extends @Nullable Object> Iterator<T> concatNoDefensiveCopy(
      Iterator<? extends T>... inputs) {
    for (Iterator<? extends T> input : checkNotNull(inputs)) {

import jakarta.annotation.Resource;

/**
 * HcHttpClient is an HTTP client implementation that extends AbstractCrawlerClient.
 * It provides various configurations and settings for making HTTP requests, including
 * connection timeouts, proxy settings, user agent, request headers, cookie management,
 * and SSL configurations. The client also supports robots.txt parsing and form-based
 * authentication schemes.

      checkEntryNotNull(key, value);
      keys[size] = key;
      values[size] = value;
      size++;
      return this;
    }

    /**
     * Adds the given {@code entry} to the map, making it immutable if necessary. Duplicate keys,
     * according to the comparator (which might be the keys' natural order), are not allowed, and
     * will cause {@link #build} to fail.
     *
     * @since 11.0
     */

        } else {
            boolean runningOnCI = isRunningOnCI(cliRequest.getSystemProperties());
            if (runningOnCI) {
                slf4jLogger.info(
                        "Making this build non-interactive, because the environment variable CI equals \"true\"."
                                + " Disable this detection by removing that variable or adding --force-interactive.");