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);