public static MixedTable loadMixedTable(MixedFormatTableLoader tableLoader) {
    tableLoader.open();
    MixedTable table = tableLoader.loadMixedFormatTable();
    try {
      tableLoader.close();
    } catch (IOException e) {
      throw new UncheckedIOException(e);
    }
    return table;
  }
An util that loads mixed-format table, build mixed-format log writer and so on.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/util/MixedFormatUtils.java