default MixedFormatTableLoader getTableLoader(
      String catalogName, String metastoreUrl, MixedTable mixedTable) {
    TableIdentifier identifier =
        TableIdentifier.of(
            catalogName, mixedTable.id().getDatabase(), mixedTable.id().getTableName());
    InternalCatalogBuilder internalCatalogBuilder =
        InternalCatalogBuilder.builder().metastoreUrl(metastoreUrl);
    return MixedFormatTableLoader.of(identifier, internalCatalogBuilder, mixedTable.properties());
  }
This class contains flink table rowType schema and others, and will replace {@link FlinkTestBase}
base class in the future.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/test/java/org/apache/amoro/flink/FlinkTableTestBase.java