add
abstract fun addItem(jsonData: String, callback: SuccessListener<SyncListJava.Item>): CancellationToken
Add Item in the SyncListJava.
Return
CancellationToken which allows to cancel network request.
Parameters
json
Item data to set as a serialized JSON object.
callback
Async result listener that will receive new value of the Item in its onSuccess() callback or any error in onFailure() callback.