code: public static int cusparseXcsr2coo(
          cusparseHandle handle, 
          Pointer csrSortedRowPtr, 
          int nnz, 
          int m, 
          Pointer cooRowInd, 
          int idxBase)
      {
          return checkResult(cusparseXcsr2cooNative(handle, csrSortedRowPtr, nnz, m, cooRowInd, idxBase));
      }
docs: Description: This routine uncompresses the indecis of rows or columns.
  It can be interpreted as a conversion from CSR to COO sparse storage
  format.