code: public static int cudnnGetRNNDataDescriptor(
          cudnnRNNDataDescriptor RNNDataDesc, 
          int[] dataType, 
          int[] layout, 
          int[] maxSeqLength, 
          int[] batchSize, 
          int[] vectorSize, 
          int arrayLengthRequested, 
          int[] seqLengthArray, 
          Pointer paddingFill)
      {
          return checkResult(cudnnGetRNNDataDescriptorNative(RNNDataDesc, dataType, layout, maxSeqLength, batchSize, vectorSize, arrayLengthRequested, seqLengthArray, paddingFill));
      }
docs: symbol for filling padding position in output