def data_transform raw_data, opts={}
      if config[:data_transform].present?
        config[:data_transform].call *args, &block
      else
        raw_data
      end
    end
def data_transform raw_data, opts={}
      if config[:data_transform].present?
        config[:data_transform].call *args, &block
      else
        raw_data
      end
    end
Tranform data to standard csv format