public static boolean isBaseStore(Map<String, String> properties, TableFormat format) {
    String tableFormat = properties.get(TableProperties.TABLE_FORMAT);
    String tableStore = properties.get(TableProperties.MIXED_FORMAT_TABLE_STORE);
    return format.name().equalsIgnoreCase(tableFormat)
        && TableProperties.MIXED_FORMAT_TABLE_STORE_BASE.equalsIgnoreCase(tableStore);
  }
Check if the given table properties is the base store of mixed-format,

@param properties properties of the table.
@param format - {@link TableFormat#MIXED_ICEBERG} or {@link TableFormat#MIXED_HIVE}
@return true if this is a base store of mixed-format.
amoro-format-iceberg/src/main/java/org/apache/amoro/utils/TablePropertyUtil.java