Function isOperation

src/linux/cgroups.cpp:1867–1875

static bool isOperation(const string& s)
{
  return (s == "Total" ||
          s == "Read" ||
          s == "Write" ||
          s == "Sync" ||
          s == "Async" ||
          s == "Discard");
}


static Try<Operation> parseOperation(const string& s)