code: public static int nvgraphConvertGraph(
          nvgraphHandle handle, 
          nvgraphGraphDescr srcDescrG, 
          nvgraphGraphDescr dstDescrG, 
          int dstTType)
      {
          return checkResult(nvgraphConvertGraphNative(handle, srcDescrG, dstDescrG, dstTType));
      }
docs: Convert graph to another structure