Piwik\Columns\Updater::getVisitDimensions PHP Method

    private function getVisitDimensions()
    {
        // see eg https://github.com/piwik/piwik/issues/8399 we fetch them only on demand to improve performance
        if (!isset($this->visitDimensions)) {
            $this->visitDimensions = VisitDimension::getAllDimensions();
        }
        return $this->visitDimensions;
    }