public static @NotNull <Key, Value> PersistentMapBuilder<Key, Value> newBuilder(@NotNull Path file,
                                                                                  @NotNull KeyDescriptor<Key> keyDescriptor,
                                                                                  @NotNull DataExternalizer<Value> valueExternalizer) {
    return new PersistentMapBuilder<>(file, keyDescriptor, valueExternalizer);
  }
public static @NotNull <Key, Value> PersistentMapBuilder<Key, Value> newBuilder(@NotNull Path file,
                                                                                  @NotNull KeyDescriptor<Key> keyDescriptor,
                                                                                  @NotNull DataExternalizer<Value> valueExternalizer)