docs: public static int nvgraphSssp(
          nvgraphHandle handle, 
          nvgraphGraphDescr descrG, 
          long weight_index, 
          Pointer source_vert, 
          long sssp_index)
      {
          return checkResult(nvgraphSsspNative(handle, descrG, weight_index, source_vert, sssp_index));
      }