&nbsp;source)</pre>
<div class="block">Tests for the presence of environment variables.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>source</code> - the string to test</dd>
<dt><span class="strong">Returns:</span></dt><dd>true if the argument contains one or more environment
 variables</dd></dl>
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<h4>substitute</h4>
<pre>public&nbsp;java.lang.String&nbsp;substitute(java.lan