some progress

content/docs/webtransport/session.md

@@ -4,6 +4,17 @@ toc: true
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+A WebTransport Session is the equivalent of a [QUIC Connection]({{< relref "../quic/connection.md" }}): It allows opening and accepting streams, and sending and receiving of datagrams.
+
+The API exposed of the `webtransport.Session` is _almost_ identical to the `quic.Connection`, with a few minor differences: For example, QUIC allows streams to be reset using a 62-bit error code, whereas WebTransport limits the error code range to 32 bits.
+
+## Closing a WebTransport Session
+
+The WebTransport session can be closed by calling the `CloseWithError` method. **TODO: expand and give a code sample**
+
+Of course, the underlying QUIC connection could also be closed for a number of reasons, so any of the errors described in the [error assertion]({{< relref "../quic/connection.md#error-assertion" }}) might occur as well.
+
+
 ## 📝 Future Work
 
 * WebTransport Datagrams: [#8](https://github.com/quic-go/webtransport-go/issues/8)