<p><code>outbound_group_session_key_length sess</code></p><p>Get the number of bytes returned by olm_outbound_group_session_key()</p></dd></dl><dl><dt class="spec value" id="val-outbound_group_session_key"><a href="#val-outbound_group_session_key" class="anchor"></a><code><span class="keyword">val</span> outbound_group_session_key : <span><a href="../Types/OutboundGroupSession/index.html#type-t">Types.OutboundGroupSession.t</a> Ctypes_static.ptr</span> <span>&#45;&gt;</span> <span>Unsigned.uint8 Ctypes_stat