dispose method
void
dispose()
Releases the native handle and every stream still owned by this session.
Implementation
void dispose() {
if (_disposed) return;
_disposed = true;
_datagrams?.dispose();
_datagrams = null;
if (!_incomingBi.isClosed) _incomingBi.close();
if (!_incomingUni.isClosed) _incomingUni.close();
b.wt_connection_free(_connection);
completeClosed();
}