ass="block">Returns a list of the <code>PersistenceProvider</code> implementations 
 available in the runtime environment.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>list of the persistence providers available 
         in the environment</dd>
</dl>
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<h4>clearCachedProviders</h4>
<pre>void&nbsp;clearCachedProviders()</pre>
<div class="block">Clear cache of providers.</div>
</