nstructor">Belt_MutableQueue</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;isEmpty&nbsp;:&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="constructor">Belt_MutableQueue</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;bool<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;fromArray&nbsp;:&nbsp;<span class="keywordsign">'</span>a&nbsp;array&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">