class ConfigTranslationEntityListBuilder

class ConfigTranslationEntityListBuilder extends ConfigEntityListBuilder implements ConfigTranslationEntityListBuilderInterface {
    
    /**
     * Provides user facing strings for the filter element.
     *
     * @return array
     */
    protected function getFilterLabels() {
        return [
            'placeholder' => $this->t('Enter label'),
            'description' => $this->t('Enter a part of the label or description to filter by.'),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function render() {
        $build = parent::render();
        $filter = $this->getFilterLabels();
        usort($build['table']['#rows'], [
            $this,
            'sortRows',
        ]);
        $build['filters'] = [
            '#type' => 'container',
            '#attributes' => [
                'class' => [
                    'table-filter',
                    'js-show',
                ],
            ],
            '#weight' => -10,
        ];
        $build['filters']['text'] = [
            '#type' => 'search',
            '#title' => $this->t('Search'),
            '#size' => 30,
            '#placeholder' => $filter['placeholder'],
            '#attributes' => [
                'class' => [
                    'table-filter-text',
                ],
                'data-table' => '.config-translation-entity-list',
                'autocomplete' => 'off',
                'title' => $filter['description'],
            ],
        ];
        $build['table']['#attributes']['class'][] = 'config-translation-entity-list';
        $build['table']['#weight'] = 0;
        $build['#attached']['library'][] = 'system/drupal.system.modules';
        return $build;
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildRow(EntityInterface $entity) {
        $row['label']['data'] = $entity->label();
        $row['label']['class'][] = 'table-filter-text-source';
        return $row + parent::buildRow($entity);
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildHeader() {
        $header['label'] = $this->t('Label');
        return $header + parent::buildHeader();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getOperations(EntityInterface $entity) {
        $operations = parent::getOperations($entity);
        foreach (array_keys($operations) as $operation) {
            // This is a translation UI for translators. Show the translation
            // operation only.
            if (!($operation == 'translate')) {
                unset($operations[$operation]);
            }
        }
        return $operations;
    }
    
    /**
     * {@inheritdoc}
     */
    public function sortRows($a, $b) {
        return $this->sortRowsMultiple($a, $b, [
            'label',
        ]);
    }
    
    /**
     * Sorts an array by multiple criteria.
     *
     * @param array $a
     *   First item for comparison.
     * @param array $b
     *   Second item for comparison.
     * @param array $keys
     *   The array keys to sort on.
     *
     * @return int
     *   The comparison result for uasort().
     */
    protected function sortRowsMultiple($a, $b, $keys) {
        $key = array_shift($keys);
        $a_value = is_array($a) && isset($a[$key]['data']) ? $a[$key]['data'] : '';
        $b_value = is_array($b) && isset($b[$key]['data']) ? $b[$key]['data'] : '';
        if ($a_value == $b_value && !empty($keys)) {
            return $this->sortRowsMultiple($a, $b, $keys);
        }
        return strnatcasecmp($a_value, $b_value);
    }
    
    /**
     * {@inheritdoc}
     */
    public function setMapperDefinition($mapper_definition) {
        // @todo Why is this method called on all config list controllers?
        return $this;
    }

}