Path Parameters always 'null', included in Query Parameters?

A question.

The HttpServerExchange has String Deques of three different parameter sources - path, query and body. I'm using a routing handler.

On a sample GET request with a path parameter: GET /test/

- using /test/232323232
The "id" parameter is in query parameters and not path parameters. In fact, path parameters is always null. Logic would dictate that a parameter in the URI path would show up in path parameters and not query parameters?

Are path parameters used for something else entirely? Or is there something I'm not doing? Your documentation is unclear.