The DataStoreTask interface of the Data Store API represents a record changed in the data store when a DataStoreCursor is used to iterate through the data store's change history.
The data read-only property of the DataStoreChangeEvent interface returns the data stored in the changed record in the data store. Must return null if the operation is clear or done.
The id read-only property of the DataStoreTask interface returns the identifier of the changed record in the data store. This must return null if the operation is cleared or done.
The operation read-only property of the DataStoreTask interface returns the type of operation that represents the current change that has been made to the data store.
The revisionId read-only property of the DataStoreTask interface returns the id of the current revision of the data store, i.e. the current change that has been made to a data record.