ies programmatically returned by this method.
 </p>
 <p>
 The default implementation returns an empty set.
 </p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a map of custom application-wide properties. Returning <code>null</code> is equivalent to returning an empty set.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.0</dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
</div>
</main>
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