mutate
abstract fun mutateItem(itemKey: String, mutator: SyncMutator, callback: SuccessListener<SyncMapJava.Item>): CancellationToken
Mutate value of the Item using provided Mutator function.
Return
CancellationToken which allows to cancel network request.
Parameters
item
Key of the item to mutate.
mutator
SyncMutator which will be applied to the map item.
callback
Async result listener that will receive new value of the Item in its onSuccess() callback or any error in onFailure() callback.