eyword">val</span>&nbsp;copy&nbsp;:&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="constructor">Belt_MutableQueue</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="constructor">Belt_MutableQueue</span>.t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;size&nbsp;:&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="constructor">Belt_MutableQueue</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;