pan> yojson_of_t : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span class="xref-unresolved">Ppx_yojson_conv_lib</span>.Yojson.Safe.t</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-fieldname"><a href="#val-fieldname" class="anchor"></a><code><span><span class="keyword">val</span> fieldname : <span><a href="../../../IR/Fieldname/index.html#type-t">IR.Fieldname.t</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-t">t</a></spa