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<pre class="literallayout"><span class="identifier">iterator</span> <a name="idp51486000-bb"></a><span class="identifier">begin</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Returns an iterator to the beginning. </li>
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<pre class="literallayout"><span class="identifier">const_iterator</span> <a name="idp51487008-bb"></a><span class="identifier">begin</span><span class="special">(</span><span class="special">