ck</span></code></a> to be totally generic. In
      Fusion, <a class="link" href="algorithm/transformation/functions/push_back.html" title="push_back"><code class="computeroutput"><span class="identifier">push_back</span></code></a> is actually a generic algorithm
      that works on all sequences. Given an input sequence <code class="computeroutput"><span class="identifier">s</span></code>
      and a value <code class="computeroutput"><span class="identifier">x</span></code>, Fusion's <a class="link" hre