 <code>ELContext</code> is not relevant to this method. The results
 of all <code>ELResolver</code>s are concatenated.
 </p>

 <p>
 The <code>Iterator</code> returned is an iterator over the collection of <code>FeatureDescriptor</code> objects
 returned by the iterators returned by each component resolver's <code>getFeatureDescriptors</code> method. If
 <code>null</code> is returned by a resolver, it is skipped.
 </p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href