public PrimaryKeyData copy() {
    return new PrimaryKeyData(this);
  }
A struct of primary key values.

<p>Instances of this class can produce primary key values from a data row passed to {@link
#primaryKey(StructLike)} and calculate th tree node of data by passing to {@link #treeNode(long)}
amoro-format-iceberg/src/main/java/org/apache/amoro/data/PrimaryKeyData.java