oldValue property
final
The current value of the entry or None if the entry does not exist yet. This is used for
concurrency control - if the current value is different from this it's assumed it has been
modified by some other task and the whole RepositorySetMetadata operation is rolled back.
If that happens, the user should read the current value again, adjust the new value if
needed and retry the operation.
Implementation
final String? oldValue;