types_static.ptr</span> <span>&#45;&gt;</span> <span>Unsigned.uint8 Ctypes_static.ptr</span> <span>&#45;&gt;</span> Unsigned.size_t <span>&#45;&gt;</span> Unsigned.size_t</code></dt><dd><p><code>outbound_group_session_id sess id id_len</code></p><p>Get a base64-encoded identifier for this session.</p><p>Returns the length of the session id on success or olm_error() on failure. On failure last_error will be set with an error code. The last_error will be OUTPUT_BUFFER_TOO_SMALL if the id buffer was too small.