/**
* Sets whether to show markers for this series in the JS Writer
* @param bool $bool
* @return \Altamira\Series provides fluent interface
*/
public function showMarker($bool = true)
{
if ($this->jsWriter instanceof \Altamira\JsWriter\Ability\Lineable) {
$this->jsWriter->setSeriesShowMarker($this->getTitle(), $bool);
}
return $this;
}