class ImmutableExpressionResolver implements ExpressionResolver {

    @Override
    public String toString() {
        return getClass().getSimpleName() + " [" +
                ", placeholderReplacementInValidation=" + placeholderReplacementInValidation +
                ", placeholderResolvers=" + placeholderResolvers +
                "]";
    }

      ImmutableExpressionResolver(final List<PlaceholderResolver<?>> placeholderResolvers);
      ImmutableExpressionResolver(final List<PlaceholderResolver<?>> placeholderResolvers,
            @Nullable final String stringUsedInPlaceholderValidation);

}