" class="anchor"></a><code><span class="keyword">val</span> write_field : <a href="../IBase/Location/index.html#type-t">IBase.Location.t</a> <span>&#45;&gt;</span> <span>ref:<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> <span>&#45;&gt;</span> <a href="../IR/Fieldname/index.html#type-t">IR.Fieldname.t</a> <span>&#45;&gt