s="identifier">weight_storage</span><span class="special">;</span>  <span class="comment">// Dense storage which tracks sums of weights and a variance estimate. </span>
    <span class="keyword">typedef</span> <span class="identifier">dense_storage</span><span class="special">&lt;</span> <a class="link" href="../boost/histogram/accumulators/mean.html" title="Class template mean">accumulators::mean</a><span class="special">&lt;</span><span class="special">&gt;</span> <span class="special">&gt;</span> <a name