 if any tracked items have breached the Geo Fence</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>trigger</code> - the trigger to be used</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the list of alerts for the items that have breached the geofence</dd>
</dl>
</li>
</ul>
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<h4>check</h4>
<pre>protected abstract&nbsp;ja