taxonomies to filter.
	 * @param boolean      $filter     (Optional) Whether to filter taxonomies.
	 *
	 * @return array|object
	 */
	public static function filter_exclude_taxonomies( $taxonomies, $filter = true ) {
		$taxonomies = $filter ? array_filter( $taxonomies, [ __CLASS__, 'is_taxonomy_viewable' ] ) : $taxonomies;

		/**
		 * Filter: 'rank_math_excluded_taxonomies' - Allow changing the accessible taxonomies.
		 *
		 * @api array $taxonomies The public taxonomies.
		 */
		$taxonomies = apply_filters( 'rank_math/excluded_taxonomies', $taxonomies );

		return $taxonomies;
	}

	/**
	 * Determine whether a taxonomy is viewable.
	 *
	 * @codeCoverageIgnore
	 *
	 * @param string|WP_Taxonomy $taxonomy Taxonomy name or object.
	 *
	 * @return bool
	 */
	public static function is_taxonomy_viewable( $taxonomy ) {
		if ( is_scalar( $taxonomy ) ) {
			$taxonomy = get_taxonomy( $taxonomy );
			if ( ! $taxonomy ) {
				return false;
			}
		}

		/*
		 * For categories and tags, we check for the 'public' parameter.
		 * For others, we use the 'publicly_queryable' parameter.
		 */
		return $taxonomy->publicly_queryable || ( $taxonomy->_builtin && $taxonomy->public );
	}
}