@Override
    public void close() throws Exception {
        if (catalog instanceof Closeable) {
            ((Closeable) catalog).close();
        }
    }
Iceberg writer that can distinguish different sink tables and route and distribute data into different
IcebergStreamWriter.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/iceberg/src/main/java/org/apache/inlong/sort/iceberg/sink/multiple/IcebergMultipleStreamWriter.java