*
 * ### Username and Password
 *
 * Username and password are either present, or the empty string `""` if absent. This class offers
 * no mechanism to differentiate empty from absent. Neither of these components are popular in
 * practice. Typically HTTP applications use other mechanisms for user identification and
 * authentication.
 *
 * ### Host
 *

            .add("field12", new ArrayList<>())
            .add("field13", new HashMap<>())
            // Optionals
            .add("field26", Optional.of("World"))
            .add("field27", Optional.absent())
            // Arrays
            .add("field31", new Object[] {"!!!"})
            .add("field32", new boolean[0])
            .add("field33", new byte[0])
            .add("field34", new char[0])

  }

  /**
   * Returns the number of times {@link Cache} lookup methods have returned an uncached (newly
   * loaded) value, or null. Multiple concurrent calls to {@link Cache} lookup methods on an absent
   * value can result in multiple misses, all returning the results of a single cache load
   * operation.
   */
  public long missCount() {
    return missCount;
  }

  /**

  }

  /**
   * Returns the number of times {@link Cache} lookup methods have returned an uncached (newly
   * loaded) value, or null. Multiple concurrent calls to {@link Cache} lookup methods on an absent
   * value can result in multiple misses, all returning the results of a single cache load
   * operation.
   */
  public long missCount() {
    return missCount;
  }

  /**

          .put(Joiner.class, Joiner.on(','))
          .put(Splitter.class, Splitter.on(','))
          .put(com.google.common.base.Optional.class, com.google.common.base.Optional.absent())
          .put(Predicate.class, Predicates.alwaysTrue())
          .put(Equivalence.class, Equivalence.equals())
          .put(Ticker.class, Ticker.systemTicker())

          .put(Joiner.class, Joiner.on(','))
          .put(Splitter.class, Splitter.on(','))
          .put(com.google.common.base.Optional.class, com.google.common.base.Optional.absent())
          .put(Predicate.class, Predicates.alwaysTrue())
          .put(Equivalence.class, Equivalence.equals())
          .put(Ticker.class, Ticker.systemTicker())

    int publicSuffixIndexLocal = publicSuffixIndexCache;
    if (publicSuffixIndexLocal == SUFFIX_NOT_INITIALIZED) {
      publicSuffixIndexCache =
          publicSuffixIndexLocal = findSuffixOfType(Optional.<PublicSuffixType>absent());
    }
    return publicSuffixIndexLocal;
  }

  /**
   * The index in the {@link #parts()} list at which the registry suffix begins. For example, for

   * `ConcurrentModificationException`, but if new entries are added while iterating, those new
   * entries will not be returned by the iterator. If existing entries are removed during iteration,
   * they will be absent (unless they were already returned).
   *
   * If there are I/O problems during iteration, this iterator fails silently. For example, if the

      if (urlHost.length != domain.length &&
        PublicSuffixDatabase.get().getEffectiveTldPlusOne(domain) == null
      ) {
        return null
      }

      // If the path is absent or didn't start with '/', use the default path. It's a string like
      // '/foo/bar' for a URL like 'http://example.com/foo/bar/baz'. It always starts with '/'.
      if (path == null || !path.startsWith("/")) {

        Optional<String> chop(String str) {
          if (str.endsWith(suffix)) {
            return Optional.of(str.substring(0, str.length() - suffix.length()));
          } else {
            return Optional.absent();
          }
        }
      };
    }
  }