protected function defaultOptions()
{
return array_merge(parent::defaultOptions(), ['showTooltips' => true, 'scaleShowHorizontalLines' => true, 'scaleShowLabels' => true, 'scaleLabel' => "<%=value%>", 'scaleArgLabel' => "<%=value%>", 'multiTooltipTemplate' => '<%=datasetLabel%>: <%=arg%>; <%=value%>', 'scaleBeginAtZero' => true, 'datasetStroke' => false]);
}
