return nil, err
	}

	args := &CoreDNS{
		etcdClient: etcdClient,
	}

	for _, setter := range setters {
		setter(args)
	}

	if len(args.domainNames) == 0 || args.domainIPs.IsEmpty() {
		return nil, errors.New("invalid argument")
	}

	// strip ports off of domainIPs
	domainIPsWithoutPorts := args.domainIPs.ApplyFunc(func(ip string) string {
		host, _, err := net.SplitHostPort(ip)

        } else {
            fileConfigList = Collections.emptyList();
        }

        if (webConfigList.isEmpty() && fileConfigList.isEmpty()) {
            // nothing
            if (logger.isInfoEnabled()) {
                logger.info("No crawling target urls.");
            }
            return;
        }

         */
        @Nonnull
        public DependencyResolverRequestBuilder dependency(@Nullable DependencyCoordinates dependency) {
            if (dependency != null) {
                if (this.dependencies.isEmpty()) {
                    this.dependencies = new ArrayList<>();
                }
                this.dependencies.add(dependency);
            }
            return this;
        }

        /**

    if (!parameters.isEmpty()) {
      builder.append("; ");
      Multimap<String, String> quotedParameters =
          Multimaps.transformValues(
              parameters,
              (String value) ->
                  (TOKEN_MATCHER.matchesAllOf(value) && !value.isEmpty())
                      ? value
                      : escapeAndQuote(value));

		newPolicySet = existingPolicySet.Difference(policiesToUpdate)
	}
	// We return an error if the requested policy update will have no effect.
	if policiesToUpdate.IsEmpty() {
		err = errNoPolicyToAttachOrDetach
		return updatedAt, addedOrRemoved, effectivePolicies, err
	}

	newPolicies := newPolicySet.ToSlice()
	newPolicyMapping.Policies = strings.Join(newPolicies, ",")

  }

  public void testInstanceMethod_typeParameters() throws Exception {
    Invokable<?, ?> delegate = Prepender.method("prepend", Iterable.class);
    assertThat(delegate.getTypeParameters()).isEmpty();
  }

  public void testInstanceMethod_parameters() throws Exception {
    Invokable<?, ?> delegate = Prepender.method("prepend", Iterable.class);
    ImmutableList<Parameter> parameters = delegate.getParameters();

   *
   * <p><b>Note:</b> consider representing the array as a {@link java.util.BitSet} instead,
   * replacing {@code Booleans.contains(array, true)} with {@code !bitSet.isEmpty()} and {@code
   * Booleans.contains(array, false)} with {@code bitSet.nextClearBit(0) == sizeOfBitSet}.
   *
   * @param array an array of {@code boolean} values, possibly empty

   *
   * <p><b>Note:</b> consider representing the array as a {@link java.util.BitSet} instead,
   * replacing {@code Booleans.contains(array, true)} with {@code !bitSet.isEmpty()} and {@code
   * Booleans.contains(array, false)} with {@code bitSet.nextClearBit(0) == sizeOfBitSet}.
   *
   * @param array an array of {@code boolean} values, possibly empty

  fun idleLatch(): CountDownLatch {
    taskRunner.withLock {
      // If the queue is already idle, that's easy.
      if (activeTask == null && futureTasks.isEmpty()) {
        return CountDownLatch(0)
      }

      // If there's an existing AwaitIdleTask, use it. This is necessary when the executor is
      // shutdown but still busy as we can't enqueue in that case.

   * | `http://a%20b:c%20d@host/`       | `"a%20b"`           |
   */
  @get:JvmName("encodedUsername")
  val encodedUsername: String
    get() {
      if (username.isEmpty()) return ""
      val usernameStart = scheme.length + 3 // "://".length() == 3.
      val usernameEnd = url.delimiterOffset(":@", usernameStart, url.length)
      return url.substring(usernameStart, usernameEnd)
    }