utating func removeFirst() -&gt; Self.Generator.Element</code>
    
        <h4>Declared In</h4>
        <a href="../../protocol/CollectionType/"><code>CollectionType</code></a>    
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<h4>Where SubSequence == Slice<Self></h4>



<div class="declaration inherited" id="subscript-subsequence-slice-self-subscript_-range-self-index">
<a class="toggle-link" data-toggle="collapse" href="#comment-subscript-subsequence-slice-self-subscript_-range-self-index">subscript(_: Range&lt;Self.Index&gt