@SuppressWarnings("unchecked") // safe since map is not writable
      ImmutableMap<K, V> kvMap =
          (ImmutableMap<K, V>)
              copyOfEnumMap(
                  (EnumMap<?, ? extends V>) map); // hide K (violates bounds) from J2KT, preserve V.
      return kvMap;
    }
    return copyOf(map.entrySet());
  }

  /**
   * Returns an immutable map containing the specified entries. The returned map iterates over