g original iterator concepts depending on what
the <tt class="docutils literal"><span class="pre">Iterator</span></tt> argument models.</p>
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<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
<th class="head">then <tt class="docutils literal"><span class="pre">transform_iterator</span></tt> models</th>
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