  <p>A <code>String</code>&#39;s collection of <code>Character</code>s (<a href="http://www.unicode.org/glossary/#extended_grapheme_cluster">extended grapheme
clusters</a>)
elements.</p>
</div>

<table class="standard">
<tr>
<th id="inheritance">Inheritance</th>
<td>
<code class="inherits">CollectionType, Indexable, RangeReplaceableCollectionType, SequenceType</code>
<span class="viz"><a href="hierarchy/">View Protocol Hierarchy &rarr;</a></span>
</td>
</tr>

<tr>
<th id="aliases">Associated Types</th>
<td>