code: public function getList(): IDataSource
      {
          $columns = array_map(function ($item) {
              return $this->tableName[0] . '.' . $item;
          }, $this->columns);
          return $this->connection->select($columns)->from($this->tableIdentity)->as($this->tableName[0]);
      }
docs: Get list.
  
  @return IDataSource