@Override
    public String factoryIdentifier() {
        return IDENTIFIER;
    }
Factory for creating configured instance of {@link com.ververica.cdc.connectors.sqlserver.SqlServerSource}.
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/sqlserver-cdc/src/main/java/org/apache/inlong/sort/sqlserver/SqlserverTableFactory.java