public function get_variation_sale_price( $min_or_max = 'min', $for_display = false ) {
        $prices = $this->get_variation_prices( $for_display );
        $price  = 'min' === $min_or_max ? current( $prices['sale_price'] ) : end( $prices['sale_price'] );

        return apply_filters( 'woocommerce_get_variation_sale_price', $price, $this, $min_or_max, $for_display );