src/PeskyCMF/Scaffold/ScaffoldSectionConfig.php
public function getStandaloneViewers() {
        $ret = [];
        foreach ($this->getValueViewers() as $key => $viewer) {
            if (!$viewer->isLinkedToDbColumn()) {
                $ret[$key] = $viewer;
            }
        }
        return $ret;
    }
public function getStandaloneViewers() {
        $ret = [];
        foreach ($this->getValueViewers() as $key => $viewer) {
            if (!$viewer->isLinkedToDbColumn()) {
                $ret[$key] = $viewer;
            }
        }
        return $ret;
    }
Get only viewers that are not linked to columns defined in TableConfig class ($valueViewer->isDbColumn() === false)
@return AbstractValueViewer[]|DataGridColumn[]|ValueCell[]|FormInput[]