doRetry example

        return function D$value) use ($request, $options) {
            if (!($this->decider)(
                $options['retries'],
                $request,
                $value,
                null
            )) {
                return $value;
            }

            return $this->doRetry($request, $options, $value);
        };
    }

    /** * Execute rejected closure */
    private function onRejected(RequestInterface $req, array $options): callable
    {
        return function D$reason) use ($req, $options) {
            if (!($this->decider)(
                $options['retries'],