clone method

MvccRowVersion clone()

Deep clone for safe mutation.

Implementation

MvccRowVersion clone() => MvccRowVersion(
      rowId: rowId,
      values: Map<String, dynamic>.from(values),
      createdByTxn: createdByTxn,
      deletedByTxn: deletedByTxn,
      prev: prev, // share older chain; only head is mutated
    );