Kraken\Network\Http\HttpRequest::encodeHeaders PHP Method

    protected function encodeHeaders($headers = [])
    {
        $data = '';
        foreach ($headers as $name => $values) {
            $temp = [];
            $data .= $name . ": ";
            $values = (array) $values;
            foreach ($values as $value) {
                $temp[] = $this->encodeHeader($value);
            }
            $data .= implode(", ", $temp);
            $data .= "\r\n";
        }
        return $data;
    }