public function __construct(Request $request, HeadersSet $headersSet, Body $body)
{
$this->request = $request;
$this->body = $body;
$this->headersSet = $headersSet->merge($this->body->getHeadersSet());
if ($this->headersSet->hasHeaders("Date") === false) {
$this->headersSet->addHeader("Date", gmdate("D, d M Y H:i:s", time()) . " UTC");
}
}
