if (map.containsKey(key)) {
      // When a collision happens, the colliding entry is the first entry
      // of the tail map.
      Entry<K, V> previousEntry = map.tailMap(key).entrySet().iterator().next();
      throw new IllegalArgumentException(
          "Duplicate keys in mappings "
              + previousEntry.getKey()
              + "="
              + previousEntry.getValue()
              + " and "
              + key

    }

    @SuppressWarnings("unchecked") // all methods throw immediately
    PopulatableMapAsMultimap() {
      this.map = new HashMap<>();
      this.unusableDelegate =
          (SetMultimap<K, V>)
              newProxy(
                  SetMultimap.class,
                  (proxy, method, args) -> {
                    throw new UnsupportedOperationException();
                  });
    }

            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();
            throw new IllegalBehaviorStateException(msg, e);
        }
    }

    protected <RESULT extends FileAuthentication> RESULT updateEntity(Map<String, Object> source, RESULT result) {
        return result;
    }

      .assertLogMatch(Regex("""callEnd"""))
      .assertNoMoreLogs()
  }

  @Test
  fun dnsFail() {
    client =
      OkHttpClient
        .Builder()
        .dns { _ -> throw UnknownHostException("reason") }
        .eventListenerFactory(loggingEventListenerFactory)
        .build()
    try {
      client.newCall(request().build()).execute()
      fail<Any>()

      @Override
      public Class<?> loadClass(String name) throws ClassNotFoundException {
        if (disallowedClassNames.contains(name)) {
          throw new ClassNotFoundException("I'm sorry Dave, I'm afraid I can't do that.");
        }
        if (name.startsWith(concurrentPackage)) {
          Class<?> c = findLoadedClass(name);
          if (c == null) {

          return checkNotNull(string);
        }

        @Override
        protected char @Nullable [] escape(char c) {
          // TODO: Fix tests not to call this directly and make it throw an error.
          return null;
        }
      };

  /**
   * Returns a builder for creating simple, fast escapers. A builder instance can be reused and each

  Object writeReplace() {
    return new SerializedForm<>(range, domain);
  }

  @GwtIncompatible
  @J2ktIncompatible
    private void readObject(ObjectInputStream stream) throws InvalidObjectException {
    throw new InvalidObjectException("Use SerializedForm");
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

   * the discussion in the {@link ListenableFuture#addListener ListenableFuture.addListener}
   * documentation.
   */
  public void add(Runnable runnable, Executor executor) {
    // Fail fast on a null. We throw NPE here because the contract of Executor states that it throws
    // NPE on null listener, so we propagate that contract up into the add method as well.
    checkNotNull(runnable, "Runnable was null.");

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPut_unsupportedPresentExistingValue() {
    try {
      assertEquals("put(present, existingValue) should return present or throw", v0(), put(e0()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)

     * @throws IllegalArgumentException if either name or dataStore is null
     */
    public void add(final String name, final DataStore dataStore) {
        if (name == null || dataStore == null) {
            throw new IllegalArgumentException(
                    "Both name and dataStore parameters are required. name: " + name + ", dataStore: " + dataStore);
        }
        if (logger.isDebugEnabled()) {