docs: public static int cudnnGetActivationDescriptor(
          cudnnActivationDescriptor activationDesc, 
          int[] mode, 
          int[] reluNanOpt, 
          double[] coef)/** ceiling for clipped RELU, alpha for ELU */
      {
          return checkResult(cudnnGetActivationDescriptorNative(activationDesc, mode, reluNanOpt, coef));
      }