ements <code>ManagedTask</code>, and <code>taskListener</code> is not 
 <code>null</code>, the <code>ManagedTaskListener</code> interface methods of the 
 task will not be called.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a Callable object</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if 