func (vlog *valueLog) encodedDiscardStats() []byte {
	vlog.lfDiscardStats.Lock()
	defer vlog.lfDiscardStats.Unlock()

	encodedStats, _ := json.Marshal(vlog.lfDiscardStats.m)
	return encodedStats
}
func (vlog *valueLog) encodedDiscardStats() []byte {
	vlog.lfDiscardStats.Lock()
	defer vlog.lfDiscardStats.Unlock()

	encodedStats, _ := json.Marshal(vlog.lfDiscardStats.m)
	return encodedStats
}
// encodedDiscardStats returns []byte representation of lfDiscardStats
// This will be called while storing stats in BadgerDB