@Override
  public Table getTable(
      StructType schema, Transform[] partitioning, Map<String, String> properties) {
    return null;
  }
Spark DataSource register base for mixed format
amoro-format-mixed/amoro-mixed-spark/amoro-mixed-spark-3-common/src/main/java/org/apache/amoro/spark/mixed/MixedSourceBase.java