code: @Deprecated
    public static <K extends Comparable<K>, V> ImmutableMap<K, V> copyWithSortedKeys(
        final Map<K, V> map) {
      return ImmutableSortedMap.copyOf(map);
    }
docs: Returns an immutable copy of the given map whose iteration order has keys sorted by the key
  type's natural ordering. No map keys or values may be {@code null}.
  
  @deprecated Prefer {@link com.google.common.collect.ImmutableSortedMap#copyOf(Map)}.