* @IgnoreJRERequirement somewhere that it will help.
   */
  private static <T extends @Nullable Object, E> void mapAndAdd(
      T t,
      Multiset<E> multiset,
      Function<? super T, ? extends E> elementFunction,
      ToIntFunction<? super T> countFunction) {
    multiset.add(checkNotNull(elementFunction.apply(t)), countFunction.applyAsInt(t));
  }

  /**

    this.ordering = checkNotNull(ordering);
  }

  @Override
  public int compare(@ParametricNullness F left, @ParametricNullness F right) {
    return ordering.compare(function.apply(left), function.apply(right));
  }

  @Override
  public boolean equals(@Nullable Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof ByFunctionOrdering) {

  --data-binary @fess-documents.json
```

#### Index Settings Migration

Fess uses OpenSearch/Elasticsearch internally, so you can:

1. Export index mappings and settings from source
2. Apply custom analyzers in Fess's `fess_config.properties`
3. Create synonym dictionaries in Fess's dictionary directory

---

### Apache Solr

For migrating from Apache Solr:

#### Document Export and Import

   * @deprecated Provided only to satisfy the {@link Predicate} interface; use {@link #contains}
   *     instead.
   */
  @InlineMe(replacement = "this.contains(input)")
  @Deprecated
  @Override
  public boolean apply(C input) {
    return contains(input);
  }

  /**
   * Returns {@code true} if every element in {@code values} is {@linkplain #contains contained} in
   * this range.
   */

   * Builder#build} is called, the builder is likely to perform better than an unsized {@link
   * #builder()} would have.
   *
   * <p>It is not specified if any performance benefits apply if {@code expectedSize} is close to,
   * but not exactly, the number of entries added to the builder.
   *
   * @since 23.1
   */
  public static <K, V> Builder<K, V> builderWithExpectedSize(int expectedSize) {

    testRuntimeOnly(testLibs.findLibrary("junitPlatform").get())
}

tasks.withType<GroovyCompile>().configureEach {
    groovyOptions.apply {
        encoding = "utf-8"
        forkOptions.jvmArgs?.add("-XX:+HeapDumpOnOutOfMemoryError")
    }
    options.apply {
        isFork = true
        encoding = "utf-8"
        compilerArgs = mutableListOf("-Xlint:-options", "-Xlint:-path")
    }
}

   * @deprecated Provided only to satisfy the {@link Predicate} interface; use {@link #contains}
   *     instead.
   */
  @InlineMe(replacement = "this.contains(input)")
  @Deprecated
  @Override
  public boolean apply(C input) {
    return contains(input);
  }

  /**
   * @deprecated Provided only to satisfy the {@link java.util.function.Predicate} interface; use
   *     {@link #contains} instead.
   * @since 21.0
   */

				// Skip transitioned objects for now. TBD
				if version.IsRemote() {
					stopFn(version.Size, errors.New("ILM Tiered version will be skipped for now"))
					continue
				}

				// Apply lifecycle rules on the objects that are expired.
				if filterLifecycle(bucket, version.Name, version) {
					expired++
					stopFn(version.Size, errors.New("ILM expired object/version will be skipped"))
					continue

    this.ordering = checkNotNull(ordering);
  }

  @Override
  public int compare(@ParametricNullness F left, @ParametricNullness F right) {
    return ordering.compare(function.apply(left), function.apply(right));
  }

  @Override
  public boolean equals(@Nullable Object object) {
    if (object == this) {
      return true;
    }
    if (object instanceof ByFunctionOrdering) {

  public boolean containsKey(@Nullable Object key) {
    if (unfiltered.containsKey(key)) {
      @SuppressWarnings("unchecked") // k is equal to a K, if not one itself
      K k = (K) key;
      return keyPredicate.apply(k);
    }
    return false;
  }

  @Override
  public Collection<V> removeAll(@Nullable Object key) {
    return containsKey(key) ? unfiltered.removeAll(key) : unmodifiableEmptyCollection();
  }