@interface MPSNDArrayReductionSumGradient : MPSNDArrayReductionGradient
- (id)copyWithZone:(struct _NSZone { } *)a0 device:(id)a1;
- (id)initWithCoder:(id)a0 device:(id)a1;
- (void)encodeWithCoder:(id)a0;
- (id)initWithDevice:(id)a0 axis:(unsigned long long)a1;
@end