private void expireMixedFiles(
      IcebergTableMaintainer.ExpireFiles changeFiles,
      IcebergTableMaintainer.ExpireFiles baseFiles,
      long expireTimestamp) {
    Optional.ofNullable(changeMaintainer)
        .ifPresent(c -> c.expireFiles(changeFiles, expireTimestamp));
    Optional.ofNullable(baseMaintainer).ifPresent(c -> c.expireFiles(baseFiles, expireTimestamp));
  }
Table maintainer for mixed-iceberg and mixed-hive tables.
amoro-ams/src/main/java/org/apache/amoro/server/optimizing/maintainer/MixedTableMaintainer.java