class QuicktabListBuilder

class QuicktabListBuilder extends ConfigEntityListBuilder {
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'quicktabs_list';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildHeader() {
        $header['title'] = $this->t('QuickSet');
        $header['storage'] = $this->t('Storage');
        return $header + parent::buildHeader();
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildRow(EntityInterface $entity) {
        $row['title'] = $entity->id();
        $row['storage'] = $this->t('Normal');
        return $row + parent::buildRow($entity);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDefaultOperations(EntityInterface $entity) {
        
        /** @var \Drupal\Core\Config\Entity\ConfigEntityInterface $entity */
        $operations = parent::getDefaultOperations($entity);
        if ($entity->hasLinkTemplate('edit')) {
            $operations['edit'] = array(
                'title' => t('Edit quicktab'),
                'weight' => 10,
                'url' => $entity->urlInfo('edit'),
            );
            $operations['delete'] = array(
                'title' => t('Delete quicktab'),
                'weight' => 20,
                'url' => $entity->urlInfo('delete'),
            );
            $operations['clone'] = array(
                'title' => t('Clone quicktab'),
                'weight' => 30,
                'url' => $entity->urlInfo('clone'),
            );
            $operations['export'] = array(
                'title' => t('Export quicktab'),
                'weight' => 40,
                'url' => $entity->urlInfo('export'),
            );
        }
        return $operations;
    }

}