s="n">precede</span><span class="p">(</span><span class="n">task</span><span class="p">);</span>
<span class="w">  </span><span class="n">task</span><span class="p">.</span><span class="n">precede</span><span class="p">(</span><span class="n">stop</span><span class="p">);</span>

<span class="w">  </span><span class="c1">// dump the pipeline graph structure (with composition)</span>
<span class="w">  </span><span class="n">taskflow</span><span class="p">.</span><span class="n">dump</span><span class="p">(</