Builder<K, V> builder = makeBuilder(keys.length);

      for (int i = 0; i < keys.length; i++) {
        builder.put(keys[i], values[i]);
      }
      return builder.buildOrThrow();
    }

    /**
     * Returns a builder that builds the unserialized type. Subclasses should override this method.
     */
    Builder<K, V> makeBuilder(int size) {
      return new Builder<>(size);

      Builder<K, V> builder = makeBuilder(keys.length);

      for (int i = 0; i < keys.length; i++) {
        builder.put(keys[i], values[i]);
      }
      return builder.buildOrThrow();
    }

    /**
     * Returns a builder that builds the unserialized type. Subclasses should override this method.
     */
    Builder<K, V> makeBuilder(int size) {
      return new Builder<>(size);

  private static final class SerializedForm<K, V> extends ImmutableMap.SerializedForm<K, V> {
    SerializedForm(ImmutableBiMap<K, V> bimap) {
      super(bimap);
    }

    @Override
    Builder<K, V> makeBuilder(int size) {
      return new Builder<>(size);
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  @Override
  @J2ktIncompatible // serialization