ass="keywordsign">-&gt;</span>&nbsp;bool<br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;format&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int64&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string&nbsp;=&nbsp;<span class="string">"caml_int64_format"</span><br>
<span class="keyword">end</span></code>
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