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    </li><li name="com.adenium.utils.Monoid#empty" visbl="pub" data-isabs="true" fullComment="no" group="Ungrouped">
      <a id="empty:A"></a>
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      <h4 class="signature">
      <span class="modifier_kind">
        <span class="modifier">abstract </span>
        <span class="kind">def</span>
      </span>
      <span class="symbol">
        <span class="name">empty</span><span c