o look up entities.</dd></dl>
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<h4>setClasspathRef</h4>
<pre>public&nbsp;void&nbsp;setClasspathRef(<a href="../../../../../org/apache/tools/ant/types/Reference.html" title="class in org.apache.tools.ant.types">Reference</a>&nbsp;r)</pre>
<div class="block">Allows classpath reference.  Not allowed if this catalog is
 itself a reference to another catalog -- that is, a cata