validCheckSum(s) is not serializable in ChangeSet

[bilak]

Environment

Liquibase Version: 4.9.1

Database Vendor & Version: any

Operating System Type & Version: any

Description

I'd like to build some helper script that will generate comparison changelog with newly added checkSum. I've tried to do something like

    @Test
    void writeNewCheckSum() throws IOException, LiquibaseException {

        final DatabaseConnection connection =
                new OfflineConnection("offline:oracle", new ClassLoaderResourceAccessor());
        final File changeLogFile = new File(TEST_CHANGELOG);
        try (final Liquibase liquibase =
                     new Liquibase(
                             changeLogFile.getCanonicalPath(),
                             new FileSystemResourceAccessor(File.listRoots()), connection)) {
            liquibase.getDatabaseChangeLog().getChangeSets()
                    .forEach(this::addValidCheckSumIfMissing);

            final File modifiedChangeLogFile = new File(changeLogFile.getCanonicalPath()+".modified");
            try (final FileOutputStream fileOutputStream = new FileOutputStream(modifiedChangeLogFile)) {

                ChangeLogSerializerFactory.getInstance().getSerializer(".yml")
                        .write(liquibase.getDatabaseChangeLog().getChangeSets(), fileOutputStream);
            }
        }
    }

however when I serialize the changelog validCheckSums are not written. That could be a problem that validCheckSum is not in method getSerializableFields but I don't know if that's by design or it's an error because I can see there labels twice.

Steps To Reproduce

see the above code

Actual Behavior

actually validCheckSum are not written when serializing the object.

Expected/Desired Behavior

validCheckSum is being written to the serialized file