Why is it impossible to execute isNotNull in a column with DataType.SERIALIZABLE in ormlite?

Question

Using ORMLite 4.48 on Android, consider the following user table ...

@DatabaseTable(tableName = "users")
public class User {

    @DatabaseField(columnName = Column.UUID)
    protected String uuid;

    @DatabaseField(columnName = Column.FIRST_NAME)
    protected String firstName = null;

    @DatabaseField(columnName = Column.LAST_NAME)
    protected String lastName = null;

    @DatabaseField(columnName = Column.ADDRESS, dataType = DataType.SERIALIZABLE)
    protected Address address = null;

    // ...
}

(The address class is a human readable address translated from lat / lon)

... with the following query ...

List<User> users = getDbHelper().getDao(User.class)
                .queryBuilder()
                .where()
                .isNotNull(User.Column.ADDRESS)
                .query();

... which throws this exception:

java.sql.SQLException: Field 'address' is of data type com.j256.ormlite.field.types.SerializableType@42ac7650 which can not be compared
        at com.j256.ormlite.stmt.query.BaseComparison.<init>(BaseComparison.java:27)
        at com.j256.ormlite.stmt.query.IsNotNull.<init>(IsNotNull.java:19)
        at com.j256.ormlite.stmt.Where.isNotNull(Where.java:315)
        ...

Apparently, the sentence IS NOT NULLcannot be used in a field that is stored as DataType.SERIALIZABLE.

Digging through ORMLite code, the BaseComparison constructor checks to see if fieldType is comparable:

https://github.com/j256/ormlite-core/blob/master/src/main/java/com/j256/ormlite/stmt/query/BaseComparison.java

protected BaseComparison(String columnName, FieldType fieldType, Object value, boolean isComparison)
        throws SQLException {
    if (isComparison && fieldType != null && !fieldType.isComparable()) {
        throw new SQLException("Field '" + columnName + "' is of data type " + fieldType.getDataPersister()
                + " which can not be compared");
    }

    ...
}

Obviously SerializableType.isComparable()returns false:

https://github.com/j256/ormlite-core/blob/master/src/main/java/com/j256/ormlite/field/types/SerializableType.java

@Override
public boolean isComparable() {
    return false;
}

, , . Where.isNull() Where.isNotNull()? SQLite ORMLite ?