  explicit SparseSegmentReductionSqrtNOp(OpKernelConstruction* context)
      : SparseSegmentReductionOpBase<Device, T>(
            context, false /*is_mean*/, true /*is_sqrtn*/,
            false /* has_num_segments */, T(0) /* default_value */) {}
  explicit SparseSegmentReductionSqrtNOp(OpKernelConstruction* context)
      : SparseSegmentReductionOpBase<Device, T>(
            context, false  , true  ,
            false  , T(0)  ) {}