maryTablePaddingCol">&nbsp;</td><td class="summaryTableInheritanceCol">&nbsp;</td><td class="summaryTableSignatureCol"><a class="signatureLink" href="#isPlayingBack">isPlayingBack</a> : Boolean<div class="summaryTableDescription">[read-only]
   [Read-only]  Returns true if the playback is in progress.</div>
</td><td class="summaryTableOwnerCol">ArchiveManager</td>
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<td class="summaryTablePaddingCol">&nbsp;</td><td class="summaryTableInheritanceCol">&nbsp;</td><td class="summaryTableSignat