>Unmarshal XML data from the specified InputStream and return the 
 resulting content tree.  Validation event location information may
 be incomplete when using this form of the unmarshal API.

 <p>
 Implements <a href="#unmarshalGlobal">Unmarshal Global Root Element</a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>is</code> - the InputStream to unmarshal XML data from</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the newly created root object of the java content 