></a>00215 
<a name="l00216"></a>00216 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator&gt;
<a name="l00217"></a>00217 <span class="keyword">struct </span>channel_type&lt;memory_based_step_iterator&lt;Iterator&gt; &gt; : <span class="keyword">public</span> channel_type&lt;Iterator&gt; {};
<a name="l00218"></a>00218 
<a name="l00220"></a>00220 <span class="comment">//  MemoryBasedIteratorConcept</span>
<a name="l00222"></a>00222 <span class="comment"></span><span class