@Test
  fun emptyNameForbidden() {
    val builder = Request.Builder()
    assertFailsWith<IllegalArgumentException> {
      builder.header("", "Value")
    }
    assertFailsWith<IllegalArgumentException> {
      builder.addHeader("", "Value")
    }
  }

  @Test
  fun headerAllowsTabOnlyInValues() {
    val builder = Request.Builder()
    builder.header("key", "sample\tvalue")

        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setCrawler_Exists() {
        setCrawler_Exists(null);
    }

    public void setCrawler_Exists(ConditionOptionCall<ExistsQueryBuilder> opLambda) {
        ExistsQueryBuilder builder = regExistsQ("crawler");
        if (opLambda != null) {

    @Override
    protected Map<String, String> create(Entry<String, String>[] entries) {
      ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
      for (Entry<String, String> entry : entries) {
        checkNotNull(entry);
        builder.put(entry.getKey(), entry.getValue());
      }
      return builder.buildOrThrow();
    }
  }

  public static class ImmutableMapCopyOfGenerator extends TestStringMapGenerator {

    unused = builder.build(); // this is *also* allowed
  }

  public void testBuildMutate() {
    ThreadFactory factory1 = builder.setPriority(1).build();
    assertEquals(1, factory1.newThread(monitoredRunnable).getPriority());

    builder.setPriority(2); // change the state of the builder
    assertEquals(1, factory1.newThread(monitoredRunnable).getPriority());
  }

    ImmutableMultiset.Builder<String> builder = ImmutableMultiset.builder();
    builder.addCopies("a", 2);
    builder.add("b");
    builder.add("c");
    builder.setCount("b", 0);
    ImmutableMultiset<String> multiset = builder.build();
    assertThat(multiset.elementSet()).containsExactly("a", "c").inOrder();
    builder.add("b");

    assertThrows(NullPointerException.class, () -> builder.put(null, 1));
  }

  public void testBuilderPutNullValue() {
    Builder<String, Integer> builder = new Builder<>();
    assertThrows(NullPointerException.class, () -> builder.put("one", null));
  }

  public void testBuilderPutNullKeyViaPutAll() {
    Builder<String, Integer> builder = new Builder<>();
    assertThrows(
        NullPointerException.class,

      HeldCertificate
        .Builder()
        .signedBy(intermediateCa)
        .serialNumber(3L)
        .commonName(server.hostName)
        .build()
    val certificatePinner =
      CertificatePinner
        .Builder()
        .add(server.hostName, pin(rootCa.certificate))
        .build()
    val handshakeCertificates =
      HandshakeCertificates
        .Builder()

            public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
                builder.startObject();
                builder.field("name", "test");
                builder.field("value", 123);
                builder.field("enabled", true);
                builder.startArray("items");
                builder.value("item1");
                builder.value("item2");
                builder.endArray();

        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setEndTime_GreaterThan(Long endTime) {
        setEndTime_GreaterThan(endTime, null);
    }

    public void setEndTime_GreaterThan(Long endTime, ConditionOptionCall<RangeQueryBuilder> opLambda) {
        final Object _value = endTime;

        ScriptedMetricAggregationBuilder builder = regScriptedMetricA(name);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void topHits(String name, ConditionOptionCall<TopHitsAggregationBuilder> opLambda) {
        TopHitsAggregationBuilder builder = regTopHitsA(name);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }