Set<K> ks = keySet;
    return (ks != null) ? ks : (keySet = new KeySet(this));
  }

  Collection<V> values;

  @Override
  public Collection<V> values() {
    // does not impact recency ordering
    Collection<V> vs = values;
    return (vs != null) ? vs : (values = new Values(this));
  }

  Set<Entry<K, V>> entrySet;

  @Override
  public Set<Entry<K, V>> entrySet() {

      SampleElements<Entry<K, V>> mapEntries(SampleElements<K> keys, SampleElements<V> values) {
    return new SampleElements<>(
        mapEntry(keys.e0(), values.e0()),
        mapEntry(keys.e1(), values.e1()),
        mapEntry(keys.e2(), values.e2()),
        mapEntry(keys.e3(), values.e3()),
        mapEntry(keys.e4(), values.e4()));
  }

  public E e0() {
    return e0;
  }

  public E e1() {

      SampleElements<Entry<K, V>> mapEntries(SampleElements<K> keys, SampleElements<V> values) {
    return new SampleElements<>(
        mapEntry(keys.e0(), values.e0()),
        mapEntry(keys.e1(), values.e1()),
        mapEntry(keys.e2(), values.e2()),
        mapEntry(keys.e3(), values.e3()),
        mapEntry(keys.e4(), values.e4()));
  }

  public E e0() {
    return e0;
  }

  public E e1() {

            final String key = e.getKey();
            Object value = e.getValue();
            if (value == null) {
                value = StringUtil.EMPTY;
            }
            if (value instanceof String || value == null) {
                return new Pair<>(key, value);
            }
            if (arrayFieldSet.contains(key)) {
                if (value instanceof String[]) {

 *
 * @since 4.0.0
 */
@Experimental
public interface Interpolator extends Service {

    /**
     * Interpolates the values in the given map using the provided callback function.
     * This method defaults to setting empty strings for unresolved placeholders.
     *
     * @param properties The map containing key-value pairs to be interpolated.

      headersOf("header1", "valué1")
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Unexpected char 0xe9 at 4 in header1 value: valué1")
    }
  }

  @Test fun mapFactoryRejectsUnicodeInHeaderName() {
    assertFailsWith<IllegalArgumentException> {
      mapOf("héader1" to "value1").toHeaders()
    }.also { expected ->
      assertThat(expected.message)

  /**
   * Returns {@code true} if this BiMap contains an entry whose value is equal to {@code value} (or,
   * equivalently, if this inverse view contains a key that is equal to {@code value}).
   *
   * <p>Due to the property that values in a BiMap are unique, this will tend to execute in
   * faster-than-linear time.
   *
   * @param value the object to search for in the values of this BiMap

        // Test with specific value
        FileEndOfFileInformation info = new FileEndOfFileInformation(12345L);
        String str2 = info.toString();
        assertEquals("EndOfFileInformation[endOfFile=12345]", str2);
    }

    @Test
    @DisplayName("Test toString with various values")
    void testToStringWithVariousValues() {
        // Test negative value

  }

  private static void assertCastFails(long value) {
    try {
      SignedBytes.checkedCast(value);
      fail("Cast to byte should have failed: " + value);
    } catch (IllegalArgumentException ex) {
      assertWithMessage(value + " not found in exception text: " + ex.getMessage())
          .that(ex.getMessage().contains(String.valueOf(value)))
          .isTrue();
    }
  }

  public void testCompare() {

     *
     * @param value the value whose presence in this map is to be tested
     * @return true if this map maps one or more keys to the specified value
     */
    @Override
    public boolean containsValue(final Object value) {
        return parent.containsValue(value);
    }

    /**
     * Returns the value to which the specified key is mapped.
     *