src/Protocol/Http/Sender/CurlHttpSender.php
private function initializeCurlResource(): void
    {
        if (!$this->resource) {
            $this->resource = curl_init();

            curl_setopt($this->resource, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($this->resource, CURLOPT_POST, 1);
            curl_setopt($this->resource, CURLOPT_HTTP_VERSION, 3);
        }
    }
private function initializeCurlResource(): void
    {
        if (!$this->resource) {
            $this->resource = curl_init();

            curl_setopt($this->resource, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($this->resource, CURLOPT_POST, 1);
            curl_setopt($this->resource, CURLOPT_HTTP_VERSION, 3);
        }
    }
Initialize cURL resource