Options.of(
    // UTF-8.
    "efbbbf".decodeHex(),
    // UTF-16BE.
    "feff".decodeHex(),
    // UTF-32LE.
    "fffe0000".decodeHex(),
    // UTF-16LE.
    "fffe".decodeHex(),
    // UTF-32BE.
    "0000feff".decodeHex(),
  )

/**
 * Returns an array containing only elements found in this array and also in [other]. The returned
 * elements are in the same order as in this.
 */
internal fun Array<String>.intersect(

   * are the "next" pointer (pointing to the next entry in the bucket chain), which will always be
   * less than or equal to the hashtable mask.
   *
   * <pre>
   * hash  = aaaaaaaa
   * mask  = 00000fff
   * next  = 00000bbb
   * entry = aaaaabbb
   * </pre>
   *
   * <p>The pointers in [size(), entries.length) are all "null" (UNSET).
   */
  @CheckForNull private transient int[] entries;

  /**

   * are the "next" pointer (pointing to the next entry in the bucket chain), which will always be
   * less than or equal to the hashtable mask.
   *
   * <pre>
   * hash  = aaaaaaaa
   * mask  = 00000fff
   * next  = 00000bbb
   * entry = aaaaabbb
   * </pre>
   *
   * <p>The pointers in [size(), entries.length) are all "null" (UNSET).
   */
  @CheckForNull private transient int[] entries;

  /**

    assertThat(converter.convert("0xFF")).isEqualTo((Integer) 255);
    assertThat(converter.convert("-0xFF")).isEqualTo((Integer) (-255));
    assertThat(converter.convert("#0000FF")).isEqualTo((Integer) 255);
    assertThat(converter.convert("0666")).isEqualTo((Integer) 438);
  }

  public void testStringConverter_convertError() {

    assertThat(converter.convert("0xFF")).isEqualTo((Long) 255L);
    assertThat(converter.convert("-0xFF")).isEqualTo((Long) (-255L));
    assertThat(converter.convert("#0000FF")).isEqualTo((Long) 255L);
    assertThat(converter.convert("0666")).isEqualTo((Long) 438L);
  }

  public void testStringConverter_convertError() {