code: public static int cudnnGetLRNDescriptor(
          cudnnLRNDescriptor normDesc, 
          int[] lrnN, 
          double[] lrnAlpha, 
          double[] lrnBeta, 
          double[] lrnK)
      {
          return checkResult(cudnnGetLRNDescriptorNative(normDesc, lrnN, lrnAlpha, lrnBeta, lrnK));
      }
docs: <pre>
  Retrieve the settings currently stored in an LRN layer descriptor
  Any of the provided pointers can be NULL (no corresponding value will be returned)
  </pre>