dation/index.html#type-t">Pulselib.PulseBasicInterface.Invalidation.t</a> * <a href="../Pulselib/PulseTrace/index.html#type-t">Pulselib.PulseBasicInterface.Trace.t</a>)</span> option</span></code></dt><dt class="spec value" id="val-get_must_be_valid"><a href="#val-get_must_be_valid" class="anchor"></a><code><span class="keyword">val</span> get_must_be_valid : <a href="../Pulselib/PulseAbstractValue/index.html#type-t">Pulselib.PulseBasicInterface.AbstractValue.t</a> <span>&#45;&gt;</span> <a href="index.html