itedSummaryImage" title="Inherited" alt="Inherited" src="../../../../../../images/inheritedSummary.gif"></td><td class="summaryTableSignatureCol">
<div class="summarySignature">
<a class="signatureLink" href="Series.html#isMarkerInvalid()">isMarkerInvalid</a>(marker:<a href="../series/ISeriesItemRenderer.html">ISeriesItemRenderer</a>):Boolean</div>
<div class="summaryTableDescription">
   Indicates whether special considerations should be taken for a newly created marker.</div>
</td><td class="summaryTa