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<h4>unwrap</h4>
<pre>&lt;T&gt;&nbsp;T&nbsp;unwrap(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;T&gt;&nbsp;cls)</pre>
<div class="block">Return an object of the specified type to allow access to 
 the provider-specific API.  If the provider's query 
 implementation does not support the specified class, the 
 <code>PersistenceException</code> is thrown.</div>
<dl>
<dt><span class="paramLabel">Paramet