docs: public static int cudnnActivationBackward(
          cudnnHandle handle, 
          cudnnActivationDescriptor activationDesc, 
          Pointer alpha, 
          cudnnTensorDescriptor yDesc, 
          Pointer y, 
          cudnnTensorDescriptor dyDesc, 
          Pointer dy, 
          cudnnTensorDescriptor xDesc, 
          Pointer x, 
          Pointer beta, 
          cudnnTensorDescriptor dxDesc, 
          Pointer dx)
      {
          return checkResult(cudnnActivationBackwardNative(handle, activationDesc, alpha, yDesc, y, dyDesc, dy, xDesc, x, beta, dxDesc, dx));
      }