Airship\Engine\Lens::listFilters PHP Method

    public function listFilters() : array
    {
        /**
         * If Twig gives us a way to read this information, we'll use that
         * instead.
         */
        /** @noinspection PhpInternalEntityUsedInspection */
        $filters = $this->twigEnv->getFilters();
        return \array_keys($filters);
    }