* of the [classShortenStrategy] and [callableShortenStrategy] filters,
     * but ATM we don't have a way to properly handle
     * [FirThisReference]s through the existing filters.
     *
     * We need a better way to decide shortening strategy
     * for labeled and regular `this` expressions (KT-63555).
     */
    private fun thisLabelShortenStrategy(thisReference: FirThisReference): ShortenStrategy {