span class="keyword">val</span> check_valid : <a href="../Pulselib/PulseAbstractValue/index.html#type-t">Pulselib.PulseBasicInterface.AbstractValue.t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span><span>(unit, <a href="../Pulselib/PulseInvalidation/index.html#type-t">Pulselib.PulseBasicInterface.Invalidation.t</a> * <a href="../Pulselib/PulseTrace/index.html#type-t">Pulselib.PulseBasicInterface.Trace.t</a>)</span> <a href="../IStdlib/index.html#module-IStd">IStdli