Method operator()

cachelib/object_cache/ObjectCache.h:117–123

        : hdl_(std::move(hdl)) {}

    void operator()(T*) {
      // Just release the handle.
      // Cache destroys object when all handles released.
      std::holds_alternative<ReadHandle>(hdl_)
          ? std::get<ReadHandle>(hdl_).reset()
          : std::get<WriteHandle>(hdl_).reset();
    }

    WriteHandle& getWriteHandleRef() {
      if (std::holds_alternative<ReadHandle>(hdl_)) {