Returns stream_user_data for the stream |stream_id|. The
stream_user_data is provided by submitRequest(),
submitHeaders() or setStreamUserData().
Unless it is set using setStreamUserData(), if the stream is
initiated by the remote endpoint, stream_user_data is always
null. If the stream does not exist, this function returns
null.
Returns stream_user_data for the stream |stream_id|. The stream_user_data is provided by submitRequest(), submitHeaders() or setStreamUserData(). Unless it is set using setStreamUserData(), if the stream is initiated by the remote endpoint, stream_user_data is always null. If the stream does not exist, this function returns null.