579   virtual Status Read(size_t n, Slice* result, char* scratch) = 0;
626   char* scratch;  member
653                       char* scratch) const = 0;
671       req.status = Read(req.offset, req.len, &req.result, req.scratch);  in MultiRead()
932                       char* scratch) const = 0;
1409   Status Read(size_t n, Slice* result, char* scratch) override {  in Read()  argument
1410     return target_->Read(n, result, scratch);  in Read()
1421                         char* scratch) override {  in PositionedRead()  argument
1422     return target_->PositionedRead(offset, n, result, scratch);  in PositionedRead()
1435               char* scratch) const override {  in Read()  argument
1436     return target_->Read(offset, n, result, scratch);  in Read()
1542               char* scratch) const override {  in Read()  argument
1543     return target_->Read(offset, n, result, scratch);  in Read()