his to make sure one extra renamed
	 *            variable key does not get removed. IMPORTANT: keep this method in line with
	 *            the parent on which it is based!}}
	 *
	 * @param string[] $dirty Original option as retrieved from the database.
	 * @param string[] $clean Filtered option where any options which shouldn't be in our option
	 *                     have already been removed and any options which weren't set
	 *                     have been set to their defaults.
	 *
	 * @return string[]
	 */
	protected function retain_variable_keys( $dirty, $clean ) {
		if ( ( is_array( $this->variable_array_key_patterns ) && $this->variable_array_key_patterns !== [] ) && ( is_array( $dirty ) && $dirty !== [] ) ) {

			// Add the extra pattern.
			$patterns   = $this->variable_array_key_patterns;
			$patterns[] = 'tax-hideeditbox-';

			/**
			 * Allow altering the array with variable array key patterns.
			 *
			 * @param array $patterns Array with the variable array key patterns.
			 */
			$patterns = apply_filters( 'wpseo_option_titles_variable_array_key_patterns', $patterns );

			foreach ( $dirty as $key => $value ) {

				// Do nothing if already in filtered option array.
				if ( isset( $clean[ $key ] ) ) {
					continue;
				}

				foreach ( $patterns as $pattern ) {
					if ( strpos( $key, $pattern ) === 0 ) {
						$clean[ $key ] = $value;
						break;
					}
				}
			}
		}

		return $clean;
	}

	/**
	 * Retrieves a list of separator options.
	 *
	 * @return string[] An array of the separator options.
	 */
	protected static function get_separator_option_list() {
		$separators = [
			'sc-dash'   => [
				'option' => '-',
				'label'  => __( 'Dash', 'wordpress-seo' ),
			],
			'sc-ndash'  => [
				'option' => '–',
				'label'  => __( 'En dash', 'wordpress-seo' ),
			],
			'sc-mdash'  => [
				'option' => '—',
				'label'  => __( 'Em dash', 'wordpress-seo' ),
			],
			'sc-colon'  => [
				'option' => ':',
				'label'  => __( 'Colon', 'wordpress-seo' ),
			],
			'sc-middot' => [
				'option' => '·',
				'label'  => __( 'Middle dot', 'wordpress-seo' ),
			],
			'sc-bull'   => [
				'option' => '•',
				'label'  => __( 'Bullet', 'wordpress-seo' ),
			],
			'sc-star'   => [
				'option' => '*',
				'label'  => __( 'Asterisk', 'wordpress-seo' ),
			],
			'sc-smstar' => [
				'option' => '⋆',
				'label'  => __( 'Low asterisk', 'wordpress-seo' ),
			],
			'sc-pipe'   => [
				'option' => '|',
				'label'  => __( 'Vertical bar', 'wordpress-seo' ),
			],
			'sc-tilde'  => [
				'option' => '~',
				'label'  => __( 'Small tilde', 'wordpress-seo' ),
			],
			'sc-laquo'  => [
				'option' => '«',
				'label'  => __( 'Left angle quotation mark', 'wordpress-seo' ),
			],
			'sc-raquo'  => [
				'option' => '»',
				'label'  => __( 'Right angle quotation mark', 'wordpress-seo' ),
			],
			'sc-lt'     => [
				'option' => '>',
				'label'  => __( 'Less than sign', 'wordpress-seo' ),
			],
			'sc-gt'     => [
				'option' => '<',
				'label'  => __( 'Greater than sign', 'wordpress-seo' ),
			],
		];

		/**
		 * Allows altering the separator options array.
		 *
		 * @param array $separators Array with the separator options.
		 */
		$separator_list = apply_filters( 'wpseo_separator_option_list', $separators );

		if ( ! is_array( $separator_list ) ) {
			return $separators;
		}

		return $separator_list;
	}
}
<br />
<b>Warning</b>:  call_user_func() expects parameter 1 to be a valid callback, class 'WPSEO_Option_Titles' not found in <b>/home/healths/public_html/wp-content/plugins/wordpress-seo/inc/options/class-wpseo-options.php</b> on line <b>63</b><br />
<br />
<b>Fatal error</b>:  Uncaught TypeError: Argument 1 passed to WPSEO_Options::register_option() must be an instance of WPSEO_Option, null given, called in /home/healths/public_html/wp-content/plugins/wordpress-seo/inc/options/class-wpseo-options.php on line 63 and defined in /home/healths/public_html/wp-content/plugins/wordpress-seo/inc/options/class-wpseo-options.php:99
Stack trace:
#0 /home/healths/public_html/wp-content/plugins/wordpress-seo/inc/options/class-wpseo-options.php(63): WPSEO_Options::register_option()
#1 /home/healths/public_html/wp-content/plugins/wordpress-seo/inc/options/class-wpseo-options.php(86): WPSEO_Options-&gt;__construct()
#2 /home/healths/public_html/wp-content/plugins/wordpress-seo/wp-seo-main.php(341): WPSEO_Options::get_instance()
#3 /home/healths/public_html/wp-includes/class-wp-hook.php(324): wpseo_init()
#4 /home/healths/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters()
#5 /home/healths/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action()
#6 /home/healths/public_html/w in <b>/home/healths/public_html/wp-content/plugins/wordpress-seo/inc/options/class-wpseo-options.php</b> on line <b>99</b><br />