@interface MPSNNConcatenationGradientNode : MPSNNGradientFilterNode {
unsigned long long _sourceIndex;
}
+ (id)nodeWithSourceGradient:(id)a0 sourceImage:(id)a1 gradientState:(id)a2;
- (id)initWithSourceGradient:(id)a0 sourceImage:(id)a1 gradientState:(id)a2;
- (void *)newFilterNode;
@end