/**
  * @param \Drupal\block\Entity\Block $block
  *
  * @return string
  */
 protected function getGroupForBlock(Block $block) {
   /** @var ConditionPluginCollection $conditions */
   $conditions = $block->getVisibilityConditions();
   $config_block_visibility_group = '';
   if ($conditions->has('condition_group')) {
     $condition_config = $conditions->get('condition_group')
       ->getConfiguration();
     $config_block_visibility_group = $condition_config['block_visibility_group'];
     return $config_block_visibility_group;
   }
   return $config_block_visibility_group;
 }