/**
* Generic method to get an evolution graph or a sparkline for the row evolution popover.
* Do as much as possible from outside the controller.
* @return Piwik_ViewDataTable
*/
public function getRowEvolutionGraph()
{
$view = parent::getRowEvolutionGraph();
$view->setCustomParameter(self::IS_MULTI_EVOLUTION_PARAM, true);
return $view;
}
