s="spec value" id="val-invalidate"><a href="#val-invalidate" class="anchor"></a><code><span class="keyword">val</span> invalidate : <span>(<a href="../Pulselib/PulseAbstractValue/index.html#type-t">Pulselib.PulseBasicInterface.AbstractValue.t</a> * <a href="../Pulselib/PulseValueHistory/index.html#type-t">Pulselib.PulseBasicInterface.ValueHistory.t</a>)</span> <span>&#45;&gt;</span> <a href="../Pulselib/PulseInvalidation/index.html#type-t">Pulselib.PulseBasicInterface.Invalidation.t</a> <span>&#45;&gt;</spa