if b.workflowFinished {
// 1. request cancel activity
// 2. workflow task complete
// above will generate 2 then 1
b.dbBufferBatch = nil
b.memBufferBatch = nil
return b.scheduledIDToStartedID, b.requestIDToEventID
}
b.dbClearBuffer = b.dbClearBuffer || len(b.dbBufferBatch) > 0