code: public static Map<String, Object> buildParametersForColumns(final String colsAsCsv) {
          final Map<String, Object> mapping = new HashMap<>();
          mapping.put(FPConstants.DETAIL_ID, buildColumns(colsAsCsv));
          return mapping;
      }
docs: Creates a Mapping for a WriterFactory for the given list of columns.
  @param colsAsCsv comma-separated column names
  @return a map to be used in, for instance, DelimiterWriterFactory