/**
  * {@inheritDoc}
  */
 public function drop(ConnectionInterface $db)
 {
     try {
         $sql = [];
         if ($this->drop !== null) {
             $sql = (array) $this->drop;
         }
         foreach ($sql as $query) {
             $stmt = $db->prepare($query);
             $stmt->execute();
             $stmt->closeCursor();
         }
     } catch (Exception $e) {
         return false;
     }
     return true;
 }