src/BackendIntegration/InputScreen/InputScreenGroupingAndSorting.php
public function getRenderGroupAttribute()
    {
        if (!empty($this->data['rendergroupattr'])) {
            $metaModel = $this->getMetaModel();
            if ($metaModel) {
                $attribute = $metaModel->getAttributeById($this->data['rendergroupattr']);
                if ($attribute) {
                    return $attribute->getColName();
                }
            }
        }

        return '';
    }
public function getRenderGroupAttribute()
    {
        if (!empty($this->data['rendergroupattr'])) {
            $metaModel = $this->getMetaModel();
            if ($metaModel) {
                $attribute = $metaModel->getAttributeById($this->data['rendergroupattr']);
                if ($attribute) {
                    return $attribute->getColName();
                }
            }
        }

        return '';
    }
{@inheritDoc}