      
        <dt id="QUEUE-constant" class="">QUEUE =
          
        </dt>
        <dd><pre class="code"><span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>queue</span><span class='tstring_end'>&quot;</span></span></pre></dd>
      
        <dt id="RETRY-constant" class="">RETRY =
          
        </dt>
        <dd><pre class="code"><span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>retry</span><span class='tstring_end'>