top-most display object in a loaded SWF file.</p>
<p>For example, if you create a new Sprite object by calling the
<code><a href="../../openfl/display/Sprite.html#Sprite">Sprite</a>()</code> constructor method, its <code>root</code> property
is <code>null</code> until you add it to the display list(or to a display
object container that is off the display list but that is a child of the
top-most display object in a SWF file).</p>
<p>For a loaded SWF file, even though the Loader object used to load the
file m