- [`KT-65345`](https://youtrack.jetbrains.com/issue/KT-65345) K2: unify FirDesignation and LLFirResolveTarget
- [`KT-61757`](https://youtrack.jetbrains.com/issue/KT-61757) K2 IDE: resolution to buitlins does not work for from common module

        [k2: "2"]           | { }                       | { it.put("k1", notDefined()) ; it.insert("k2", "2") } | "put missing then append"
        [k2: "2"]           | { }                       | { it.insert("k1", notDefined()) ; it.put("k2", "2") } | "insert missing then add"
        [k2: "2"]           | { it.set([k0: "0"]) }     | { it.put("k1", notDefined()) ; it.insert("k2", "2") } | "put missing to non-empty then append"

   *
   * @throws IllegalArgumentException if duplicate keys or values are added
   */
  public static <K, V> ImmutableBiMap<K, V> of(K k1, V v1, K k2, V v2) {
    checkEntryNotNull(k1, v1);
    checkEntryNotNull(k2, v2);
    return new RegularImmutableBiMap<K, V>(new Object[] {k1, v1, k2, v2}, 2);
  }

  /**
   * Returns an immutable map containing the given entries, in order.
   *

   *
   * @throws IllegalArgumentException if duplicate keys are provided
   */
  public static <K, V> ImmutableMap<K, V> of(K k1, V v1, K k2, V v2) {
    checkEntryNotNull(k1, v1);
    checkEntryNotNull(k2, v2);
    return RegularImmutableMap.create(2, new Object[] {k1, v1, k2, v2});
  }

  /**
   * Returns an immutable map containing the given entries, in order.
   *

	for _, arg := range arg2 {
		arg = indirectInterface(arg)
		k2, _ := basicKind(arg)
		truth := false
		if k1 != k2 {
			// Special case: Can compare integer values regardless of type's sign.
			switch {
			case k1 == intKind && k2 == uintKind:
				truth = arg1.Int() >= 0 && uint64(arg1.Int()) == arg.Uint()
			case k1 == uintKind && k2 == intKind:
				truth = arg.Int() >= 0 && arg1.Uint() == uint64(arg.Int())

fun test() {
    val string = <expr>(String)</expr>::class
}

// IGNORE_FE10

   */
  public static <K extends Comparable<? super K>, V> ImmutableSortedMap<K, V> of(
      K k1, V v1, K k2, V v2) {
    return fromEntries(entryOf(k1, v1), entryOf(k2, v2));
  }

  /**
   * Returns an immutable sorted map containing the given entries, sorted by the natural ordering of
   * their keys.
   *

    ImmutableListMultimap.Builder<K, V> builder = ImmutableListMultimap.builder();
    builder.put(k1, v1);
    builder.put(k2, v2);
    return builder.build();
  }

  /** Returns an immutable multimap containing the given entries, in order. */
  public static <K, V> ImmutableListMultimap<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3) {

        get() = withValidityAssertion { descriptor.isSuspend }

    override val isOperator: Boolean
        get() = withValidityAssertion {
            if (descriptor.isDynamic()) {
                // For consistency with the K2 implementation, see `FirDynamicMembersStorage`
                return@withValidityAssertion true
            }
            descriptor.isOperator
        }

    override val isExternal: Boolean

   * an entry (according to {@link Object#equals}) after the first are ignored.
   */
  public static <K, V> ImmutableSetMultimap<K, V> of(K k1, V v1, K k2, V v2) {
    ImmutableSetMultimap.Builder<K, V> builder = ImmutableSetMultimap.builder();
    builder.put(k1, v1);
    builder.put(k2, v2);
    return builder.build();
  }

  /**
   * Returns an immutable multimap containing the given entries, in order. Repeated occurrences of