How to retrieve cookie from $request parametr if it's a string?

I have this example
```
$this->worker = new Worker('websocket://0.0.0.0:8090', $this->context);
$this->worker->name = 'websocket';
$this->worker->count = 1;
$this->worker->transport = 'ssl';

$this->worker->onConnect = function($connection) {
$connection->onWebSocketConnect = function ($connection, $request) {
$connection->send($request);
};
};
```
And when i'm trying to use any method on $request like ```$request->cookie()``` i keep getting error like "Error: Call to a member function cookie() on string". Is there a build in parser for request or do i need to handle it myself?
When i worked with SSE, $request seems to be normal (not string).

Start with the WebSocket onWebSocketConnect callback and the code or documentation that defines the $request argument for Worker. Determine why it is a string in this example while SSE provides a request object, then document or correct the expected cookie-access behavior and verify it with the relevant WebSocket flow.

Written by the indexing model from the issue text.