n class="string">"%obj_field"</span><br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;set_field&nbsp;:&nbsp;<span class="constructor">Obj</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Obj</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit&nbsp;=&nbsp;<span class="string">"%obj_set_field"</span><br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;double_field&nbsp;:&nbsp;<span class="constructor