:String</code> (default = <code>null</code>)<code></code></td></tr><tr><td class="paramSpacer">&nbsp;</td></tr><tr><td width="20px"></td><td><code><span class="label">playheadTime</span>:Number</code> (default = <code>NaN</code>)<code></code></td></tr></table></div><a name="methodDetail"></a><div class="detailSectionHeader">Method Detail</div><a name="clone()"></a><table class="detailHeader" cellpadding="0" cellspacing="0"><tr><td class="detailHeaderName">clone</td><td class="detailHeaderParens">()</td><td 