<dt class="param-name"><code>reader4</code></dt>
      <dd class="param-content">
        <div class="content"><p>fourth reader type</p></div>
      </dd>
    
      <dt class="param-name"><code>map</code></dt>
      <dd class="param-content">
        <div class="content"><p>how to combine produced middlewares into a single one, of type <code>MOutput</code></p></div>
      </dd>
    
  </dl>
</section>
  </div>
</div>
  
  
  
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