code: public static int cusolverRfExtractSplitFactorsHost(
          cusolverRfHandle handle, 
          /** Output (in the host memory) */
          Pointer h_nnzL, 
          Pointer h_csrRowPtrL, 
          Pointer h_csrColIndL, 
          Pointer h_csrValL, 
          Pointer h_nnzU, 
          Pointer h_csrRowPtrU, 
          Pointer h_csrColIndU, 
          Pointer h_csrValU)
      {
          return checkResult(cusolverRfExtractSplitFactorsHostNative(handle, h_nnzL, h_csrRowPtrL, h_csrColIndL, h_csrValL, h_nnzU, h_csrRowPtrU, h_csrColIndU, h_csrValU));
      }
docs: CUSOLVERRF extraction: Get L & U individually