ained in case a third-party task uses them</div>
<dl><dt><span class="strong">Since:</span></dt>
  <dd>ant1.6</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../org/apache/tools/ant/util/optional/WeakishReference12.html" title="class in org.apache.tools.ant.util.optional"><code>WeakishReference12</code></a></dd></dl>
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