er object, it is not
possible to access the data until it has been
received completely. So, the progress event only
serves as a notification of how far the download
has progressed. To access the data before it's
entirely downloaded, use a URLStream object.</p></td></tr><tr class="indent"><th style="width:25%;"><code>securityError</code></th><td><p>Dispatched if a call to URLLoader.load() attempts
to load data from a server outside the security
sandbox. Also dispatched if a call to
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