$data['block_content']['block_content_listing_empty'] = [
'title' => $this->t('Empty block library behavior'),
'help' => $this->t('Provides a link to add a new block.'),
$data['block_content']['block_content_listing_empty'] = [
'title' => $this->t('Empty block library behavior'),
'help' => $this->t('Provides a link to add a new block.'),