public bool ProcessPartitionDeleted(string partition, CheckpointTag deletePosition, out string newState)
{
CheckDisposed();
_eventPosition = deletePosition;
_emittedEvents = null;
var newStates = _query.NotifyDeleted(
"", // trimming data passed to a JS
new[] {
partition, "" /* isSoftDedleted */
});
newState = newStates;
return(true);
}