K obverseKey = value;
      V obverseValue = key;
      return obverse.putInverse(obverseValue, obverseKey, false);
    }

    @CanIgnoreReturnValue
    @Override
    public @Nullable K forcePut(@ParametricNullness V key, @ParametricNullness K value) {
      K obverseKey = value;
      V obverseValue = key;
      return obverse.putInverse(obverseValue, obverseKey, true);
    }

    @CanIgnoreReturnValue