public static function related_products( $atts ) {
		if ( isset( $atts['per_page'] ) ) {
			$atts['limit'] = $atts['per_page'];
		}

		// @codingStandardsIgnoreStart
		$atts = shortcode_atts( array(
			'limit'    => '4',
			'columns'  => '4',
			'orderby'  => 'rand',
		), $atts, 'related_products' );
		// @codingStandardsIgnoreEnd

		ob_start();

		// Rename arg.
		$atts['posts_per_page'] = absint( $atts['limit'] );

		woocommerce_related_products( $atts );

		return ob_get_clean();
	}