src/Viserio/Component/HttpFoundation/Console/Command/DownCommand.php
protected function getRetryTime(): ?int
    {
        $retry = $this->option('retry');

        return \is_numeric($retry) && $retry > 0 ? (int) $retry : null;
    }
protected function getRetryTime(): ?int
    {
        $retry = $this->option('retry');

        return \is_numeric($retry) && $retry > 0 ? (int) $retry : null;
    }
Get the number of seconds the client should wait before retrying their request.

@return null|int