*   <li>192.0.2.1
 *   <li>192.0.2.1:80
 *   <li>[2001:db8::1] - {@link #getHost()} omits brackets
 *   <li>[2001:db8::1]:80 - {@link #getHost()} omits brackets
 *   <li>2001:db8::1 - Use {@link #requireBracketsForIPv6()} to prohibit this
 * </ul>
 *
 * <p>Note that this is not an exhaustive list, because these methods are only concerned with
 * brackets, colons, and port numbers. Full validation of the host field (if desired) is the

   * documentation for {@link Collection}:
   *
   * <blockquote>
   *
   * "Some collection implementations have restrictions on the elements that they may contain. For
   * example, some implementations prohibit null elements, and some have restrictions on the types
   * of their elements."
   *
   * </blockquote>
   */
  RESTRICTS_ELEMENTS,

  /**

   * documentation for {@link Collection}:
   *
   * <blockquote>
   *
   * "Some collection implementations have restrictions on the elements that they may contain. For
   * example, some implementations prohibit null elements, and some have restrictions on the types
   * of their elements."
   *
   * </blockquote>
   */
  RESTRICTS_ELEMENTS,

  /**

   *
   * <p>Some multimap implementations allow duplicate key-value pairs, in which case {@code put}
   * always adds a new key-value pair and increases the multimap size by 1. Other implementations
   * prohibit duplicates, and storing a key-value pair that's already in the multimap has no effect.
   *
   * @return {@code true} if the method increased the size of the multimap, or {@code false} if the

     * {@code tryLock()} technically recovers from deadlock by eventually timing out, this behavior
     * is chosen based on the assumption that it is the application's wish to prohibit any cyclical
     * lock acquisitions.
     */
    void handlePotentialDeadlock(PotentialDeadlockException exception);
  }

  /**
   * Pre-defined {@link Policy} implementations.
   *

- [`KT-58545`](https://youtrack.jetbrains.com/issue/KT-58545) KMP: prohibit implicit actualization via Java
- [`KT-58536`](https://youtrack.jetbrains.com/issue/KT-58536) KMP: prohibit `expect tailrec` / `expect external`
- [`KT-59764`](https://youtrack.jetbrains.com/issue/KT-59764) Make a frontend checker that reports cast to forward declaration as unchecked

not control copyright.  Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
your copyrighted material outside their relationship with you.

  Conveying under any other circumstances is permitted solely under

  }

  @Test fun prohibitionCharactersSpaces() {
    assertThat(stringPrep(" ")).isEqualTo(" ") // ASCII space not prohibited.
    assertThat(stringPrep("\u2003")).isNull() // EM SPACE
  }

  @Test fun prohibitionControlCharacters() {
    assertThat(stringPrep("\u007f")).isEqualTo("\u007f") // ASCII delete not prohibited.
    assertThat(stringPrep("\u0080")).isNull()
    assertThat(stringPrep("\u2029")).isNull()

 */
class Stringprep(
  /** Unassigned code points. */
  val unassigned: CodePointSet,
  /** Mappings. Note table B.3 is not used in RFC 3491. */
  val mapping: CodePointMapping,
  /** Prohibited code points. */
  val prohibitSet: CodePointSet,
  /** RandALCat code points; bidi category is "R" or "AL". */
  val randalcatSet: CodePointSet,
  /** LCat code points; bidi category is "L". */
  val lcatSet: CodePointSet,

  public static <K extends Comparable<?>, V> Builder<K, V> builder() {
    return new Builder<>();
  }

  /**
   * A builder for immutable range maps. Overlapping ranges are prohibited.
   *
   * @since 14.0
   */
  @DoNotMock
  public static final class Builder<K extends Comparable<?>, V> {
    private final List<Entry<Range<K>, V>> entries;

    public Builder() {