roi-theme/wp-content/plugins/seo-by-rank-math/includes/frontend/paper/class-misc.php

<?php
/**
 * The Misc paper.
 *
 * @since      1.0.28
 * @package    RankMath
 * @subpackage RankMath\Paper
 * @author     Rank Math <support@rankmath.com>
 */

namespace RankMath\Paper;

defined( 'ABSPATH' ) || exit;

/**
 * Misc class.
 */
class Misc implements IPaper {

	/**
	 * Retrieves the SEO title.
	 *
	 * @return string
	 */
	public function title() {
		return '';
	}

	/**
	 * Retrieves the SEO description.
	 *
	 * @return string
	 */
	public function description() {
		return '';
	}

	/**
	 * Retrieves the robots.
	 *
	 * @return string
	 */
	public function robots() {
		return [];
	}

	/**
	 * Retrieves the advanced robots.
	 *
	 * @return array
	 */
	public function advanced_robots() {
		return [];
	}

	/**
	 * Retrieves the canonical URL.
	 *
	 * @return array
	 */
	public function canonical() {
		return [];
	}

	/**
	 * Retrieves meta keywords.
	 *
	 * @return string
	 */
	public function keywords() {
		return '';
	}
}