@Override
  public Type map(Types.MapType map, Supplier<Type> keyFuture, Supplier<Type> valueFuture) {
    return map;
  }
Change the field name of a schema, change to uppercase or lowercase.

@param changeType TO_UPPERCASE or TO_LOWERCASE
amoro-format-mixed/amoro-mixed-hive/src/main/java/org/apache/amoro/hive/utils/ChangeFieldName.java