e>account_fallback_key acc fallback_key fallback_key_size</code></p></dd></dl><dl><dt class="spec value" id="val-create_outbound_session_random_length"><a href="#val-create_outbound_session_random_length" class="anchor"></a><code><span class="keyword">val</span> create_outbound_session_random_length : <span><a href="../Types/Session/index.html#type-t">Types.Session.t</a> Ctypes_static.ptr</span> <span>&#45;&gt;</span> Unsigned.size_t</code></dt><dd><p><code>create_outbound_session_random_length sess</code><