e>Collection&lt;String&gt;</code> of component identifiers that will be used to identify
 components that should be processed during the <code>execute</code> phase of the request processing lifecycle.
 </p>
 <p>
 Note that the returned collection may be unmodifiable. Modifications should be performed by calling
 <a href="#setExecute(java.util.Collection)"><code>setExecute(java.util.Collection&lt;java.lang.String&gt;)</code></a>.
 </p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the Jav