static StructLike copy(StructLike struct) {
        return struct != null ? new StructCopy(struct) : null;
    }
Copy the StructLike's values into a new one. It does not handle list or map values now.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/iceberg/src/main/java/org/apache/inlong/sort/iceberg/sink/trick/StructCopy.java