Use `FormBody.Builder` to build a request body that works like an HTML `<form>` tag. Names and values will be encoded using an HTML-compatible form URL encoding.

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient()

      fun run() {
        val formBody = FormBody.Builder()
            .add("search", "Jurassic Park")
            .build()

  }

  private fun newEventSource(accept: String? = null): EventSource {
    val builder =
      Request
        .Builder()
        .url(server.url("/"))
    if (accept != null) {
      builder.header("Accept", accept)
    }
    val request = builder.build()
    val factory = client.asEventSourceFactory()
    return factory.newEventSource(request, listener)
  }

    abstract Type usedInGenericType(Type type);

    final ImmutableList<Type> usedInGenericType(Type[] types) {
      ImmutableList.Builder<Type> builder = ImmutableList.builder();
      for (Type type : types) {
        builder.add(usedInGenericType(type));
      }
      return builder.build();
    }

    String typeName(Type type) {
      return Types.toString(type);
    }

    abstract Type usedInGenericType(Type type);

    final ImmutableList<Type> usedInGenericType(Type[] types) {
      ImmutableList.Builder<Type> builder = ImmutableList.builder();
      for (Type type : types) {
        builder.add(usedInGenericType(type));
      }
      return builder.build();
    }

    String typeName(Type type) {
      return Types.toString(type);
    }

            final IndexRequestBuilder builder = client.prepareIndex().setIndex(index).setId(id.toString()).setSource(new DocMap(doc));
            options.accept(doc, builder);
            bulkRequestBuilder.add(builder);
        }
        return bulkRequestBuilder.execute().actionGet(ComponentUtil.getFessConfig().getIndexBulkTimeout());
    }

    /**
     * Builder class for constructing search conditions and parameters.

    EventSource.Factory factory = EventSource.Factory.create(client);
    server.enqueue(
      new MockResponse.Builder()
        .body("data: hello\n\n")
        .setHeader("content-type", "text/event-stream")
        .build()
    );
    Request request = new Request.Builder().url(server.url("/")).build();
    CompletableFuture<Void> future = new CompletableFuture<>();

  }

  @Test
  fun interruptWritingRequestBody() {
    server.enqueue(MockResponse())
    server.start()
    val call =
      client.newCall(
        Request
          .Builder()
          .url(server.url("/"))
          .post(
            object : RequestBody() {
              override fun contentType() = null

              override fun writeTo(sink: BufferedSink) {

    /** Returns a new {@code TypeResolver} with {@code variable} mapping to {@code type}. */
    final TypeTable where(Map<TypeVariableKey, ? extends Type> mappings) {
      ImmutableMap.Builder<TypeVariableKey, Type> builder = ImmutableMap.builder();
      builder.putAll(map);
      for (Entry<TypeVariableKey, ? extends Type> mapping : mappings.entrySet()) {
        TypeVariableKey variable = mapping.getKey();
        Type type = mapping.getValue();

  }

  @Test
  fun processResponse() {
    server.enqueue(
      MockResponse
        .Builder()
        .body(
          """
          |data: hey
          |
          |
          """.trimMargin(),
        ).setHeader("content-type", "text/event-stream")
        .build(),
    )
    val request = Request.Builder().url(server.url("/")).build()
    val response = client.newCall(request).execute()

  private final transient ImmutableList<List<E>> axes;
  private final transient int[] axesSizeProduct;

  static <E> List<List<E>> create(List<? extends List<? extends E>> lists) {
    ImmutableList.Builder<List<E>> axesBuilder = new ImmutableList.Builder<>(lists.size());
    for (List<? extends E> list : lists) {
      List<E> copy = ImmutableList.copyOf(list);
      if (copy.isEmpty()) {
        return ImmutableList.of();
      }