WP_Navigation_Fallback::get_fallback(): WP_Post|null

71	public static function get_fallback() {72		/**73		 * Filters whether or not a fallback should be created.74		 *75		 * @since 6.3.076		 *77		 * @param bool $create Whether to create a fallback navigation menu. Default true.78		 */79		$should_create_fallback = apply_filters( 'wp_navigation_should_create_fallback', true );80 81		$fallback = static::get_most_recently_published_navigation();82 83		if ( $fallback || ! $should_create_fallback ) {84			return $fallback;85		}86 87		$fallback = static::create_classic_menu_fallback();88 89		if ( $fallback && ! is_wp_error( $fallback ) ) {90			// Return the newly created fallback post object which will now be the most recently created navigation menu.91			return $fallback instanceof WP_Post ? $fallback : static::get_most_recently_published_navigation();92		}93 94		$fallback = static::create_default_fallback();95 96		if ( $fallback && ! is_wp_error( $fallback ) ) {97			// Return the newly created fallback post object which will now be the most recently created navigation menu.98			return $fallback instanceof WP_Post ? $fallback : static::get_most_recently_published_navigation();99		}100 101		return null;102	}