@Override
                    protected List<Class<? extends JavaMigration>> getAdditionalMigrationClasses() {
                        // Get the subclass to tell us what test data class is being used as a 'migration'
                        // to load test data prior to the migration under test.
                        return List.of(AbstractCrossModuleMigrationTest.this.getTestDataClass());
                    }
Get an instance of a datasource for use when asserting database state after the migration has
been run.
stroom-app/src/test/java/stroom/app/db/migration/AbstractCrossModuleMigrationTest.java