an>&#45;&gt;</span> Unsigned.size_t</code></dt><dd><p><code>pickle_account_length acc</code></p><p>Returns the number of bytes needed to store an account</p></dd></dl><dl><dt class="spec value" id="val-pickle_session_length"><a href="#val-pickle_session_length" class="anchor"></a><code><span class="keyword">val</span> pickle_session_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>pickle_se