if (array.length == 0) {
      return "";
    }

    // For pre-sizing a builder, just get the right order of magnitude
    StringBuilder builder = new StringBuilder(array.length * 7);
    builder.append(array[0]);
    for (int i = 1; i < array.length; i++) {
      builder.append(separator).append(array[i]);
    }
    return builder.toString();
  }

  /**

    fun readHttp2HeadersList(
      headerBlock: Headers,
      protocol: Protocol,
    ): Response.Builder {
      var statusLine: StatusLine? = null
      val headersBuilder = Headers.Builder()
      for (i in 0 until headerBlock.size) {
        val name = headerBlock.name(i)
        val value = headerBlock.value(i)
        if (name == RESPONSE_STATUS_UTF8) {

    }
  }

  private static final class MockEquivalence extends Equivalence<Object> {
    final ImmutableTable.Builder<Object, Object, Boolean> equivalentExpectationsBuilder =
        ImmutableTable.builder();
    final ImmutableMap.Builder<Object, Integer> hashExpectationsBuilder = ImmutableMap.builder();
    ImmutableTable<Object, Object, Boolean> equivalentExpectations;
    ImmutableMap<Object, Integer> hashExpectations;

    }
  }

  private static final class MockEquivalence extends Equivalence<Object> {
    final ImmutableTable.Builder<Object, Object, Boolean> equivalentExpectationsBuilder =
        ImmutableTable.builder();
    final ImmutableMap.Builder<Object, Integer> hashExpectationsBuilder = ImmutableMap.builder();
    ImmutableTable<Object, Object, Boolean> equivalentExpectations;
    ImmutableMap<Object, Integer> hashExpectations;

      ImmutableList.Builder<Invokable<?, ?>> builder = ImmutableList.builder();
      for (Invokable<?, ?> factory : factories) {
        if (returnTypeToTest.isAssignableFrom(factory.getReturnType().getRawType())) {
          builder.add(factory);
        }
      }
      ImmutableList<Invokable<?, ?>> factoriesToTest = builder.build();
      Assert.assertFalse(
          "No "

    assertFalse(requiresRequestBody("GET"))
  }

  @Test
  fun hasBody() {
    val request = Request.Builder().url("http://example.com").build()
    val response =
      Response.Builder().code(200)
        .message("OK")
        .request(request)
        .protocol(Protocol.HTTP_2)
        .build()
    assertTrue(hasBody(response))
  }

    @Nonnull
    static ArtifactResolverRequestBuilder builder() {
        return new ArtifactResolverRequestBuilder();
    }

    @Nonnull
    static ArtifactResolverRequest build(
            @Nonnull Session session, @Nonnull Collection<? extends ArtifactCoordinates> coordinates) {
        return builder()
                .session(nonNull(session, "session cannot be null"))

        )
    }

    val client = clientBuilder.build()

    val request =
      Request.Builder()
        .url("https://valid-isrgrootx1.letsencrypt.org/robots.txt")
        .build()
    client.newCall(request).execute().use { response ->
      assertThat(response.code).isEqualTo(404)
      assertThat(response.protocol).isEqualTo(Protocol.HTTP_2)
    }
  }

  }

  companion object {
    val MOCKSERVER_IMAGE: DockerImageName =
      DockerImageName
        .parse("mockserver/mockserver")
        .withTag("mockserver-5.15.0")

    fun OkHttpClient.Builder.trustMockServer(): OkHttpClient.Builder =
      apply {
        val keyStoreFactory = KeyStoreFactory(Configuration.configuration(), MockServerLogger())

        val socketFactory = keyStoreFactory.sslContext().socketFactory

      OkHttpClient.Builder()
        .connectionPool(
          buildConnectionPool(
            connectionListener = connectionListener,
            taskRunner = taskRunner,
          ),
        )
        .dispatcher(Dispatcher(backend.executor))
        .taskRunnerInternal(taskRunner)
    } else {
      OkHttpClient.Builder()