code: def _get_dbal_column_type(self, type_):
          
          type_ = type_.lower()
  
          if type_ == "big_integer":
              type_ = "bigint"
          elif type == "small_integer":
              type_ = "smallint"
          elif type_ in ["medium_text", "long_text"]:
              type_ = "text"
  
          return type_
docs: Get the dbal column type.
  
          :param type_: The fluent type
          :type type_: str
  
          :rtype: str