message: [hotfix] SqlaTable has no attribute column_cls
diff: @@ -1775,8 +1775,8 @@ class Superset(BaseSupersetView):
  for column_name, config in data.get('columns').items():
  is_dim = config.get('is_dim', False)
  SqlaTable = ConnectorRegistry.sources['table']
  - TableColumn = SqlaTable.column_cls
  - SqlMetric = SqlaTable.metric_cls
  + TableColumn = SqlaTable.column_class
  + SqlMetric = SqlaTable.metric_class
  col = TableColumn(
  column_name=column_name,
  filterable=is_dim,
  