ode></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-append_field"><a href="#val-append_field" class="anchor"></a><code><span><span class="keyword">val</span> append_field : <span><span class="optlabel">?typ</span>:<a href="../../../IR/Typ/index.html#type-t">IR.Typ.t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="../../../IR/Fieldname/index.html#type-t">IR.Fieldname.t</a> <span class="arrow">