unction that evaluates to
        <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code> if a certain type <code class="computeroutput"><span class="identifier">T</span></code>
        is a conforming Fusion sequence, <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></code>
        otherwise.
      </p>
<h5>
<a name="fusion.support.is_sequen