static Validator getDefaultValidator() {
        return () -> {
            // do nothing;
        };
    }
Validator to validate the connected database satisfies the cdc connector's requirements.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/debezium/Validator.java