public static boolean isChangeStore(String tableName, String separator) {
    return tableName != null
        && tableName.endsWith(separator + MixedTable.CHANGE_STORE_IDENTIFIER + separator);
  }
Determine if it is a change store of a mixed format table by the table name.

@param tableName table name.
@param separator change store separator.
@return if it is a change store.
amoro-format-iceberg/src/main/java/org/apache/amoro/utils/MixedTableUtil.java