code: func (s *BatchModifyClusterSnapshotsInput) SetManualSnapshotRetentionPeriod(v int64) *BatchModifyClusterSnapshotsInput {
  	s.ManualSnapshotRetentionPeriod = &v
  	return s
  }
docs: // SetManualSnapshotRetentionPeriod sets the ManualSnapshotRetentionPeriod field's value.