Method get_class_name

src/crush/CrushWrapper.h:473–478

    return class_rname.count(name);
  }
  const char *get_class_name(int i) const {
    auto p = class_name.find(i);
    if (p != class_name.end())
      return p->second.c_str();
    return 0;
  }
  int get_class_id(const std::string& name) const {
    auto p = class_rname.find(name);
    if (p != class_rname.end())