@Override
    public long getPos() throws IOException {
      return (long) (splitLength * getProgress());
    }
Configures the {@code JobConf} to use the {@code MapredIcebergInputFormat} and
returns a helper to add further configuration.

@param job the {@code JobConf} to configure
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/mapred/MapredIcebergInputFormat.java