eck_valid : 
  <span><a href="../../PulsePathContext/index.html#type-t">PathContext.t</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="optlabel">?must_be_valid_reason</span>:
    <a href="../../PulseInvalidation/index.html#type-must_be_valid_reason">Pulselib.PulseBasicInterface.Invalidation.must_be_valid_reason</a> <span class="arrow">&#45;&gt;</span></span>
  <span><a href="../../PulseTrace/index.html#type-t">Pulselib.PulseBasicInterface.Trace.t</a> <span class="arrow">&#45;&gt;</span><