span class="constructor">Obj</span>.t&nbsp;=&nbsp;<span class="string">"%identity"</span><br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;obj&nbsp;:&nbsp;<span class="constructor">Obj</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;=&nbsp;<span class="string">"%identity"</span><br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;magic&nbsp;:&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span cla