code: public function dropTable($table)
      {
          $sql = $this->db->getQueryBuilder()->dropTable($table);
  
          return $this->setSql($sql)->requireTableSchemaRefresh($table);
      }
docs: Creates a SQL command for dropping a DB table.
  @param string $table the table to be dropped. The name will be properly quoted by the method.
  @return $this the command object itself