Method ~BgFetchStates

plugins/prefetch/fetch.h:157–157

private:
  BgFetchStates() : _lock(TSMutexCreate()) {}
  ~BgFetchStates() { TSMutexDestroy(_lock); }
  static BgFetchStates *_prefetchStates;

  std::map<String, BgFetchState *> _states; /* stores pointers to states per namespace */