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      <h4 id="signature" class="signature">
      <span class="modifier_kind">
        <span class="modifier">implicit </span>
        <span class="kind">object</span>
      </span>
      <span class="symbol">
        <span class="name">wbr</span><span class="result"> extends <a href="Concat$$Promoter.html" class="extype" name="org.saddle.util.Concat.Promoter">Promoter</a>[<span class="extype" nam