547                         char* scratch, IODebugContext* dbg) = 0;
596   char* scratch;  member
624                         Slice* result, char* scratch,
647           Read(req.offset, req.len, options, &req.result, req.scratch, dbg);  in MultiRead()
919                         Slice* result, char* scratch,
1207                 char* scratch, IODebugContext* dbg) override {  in Read()  argument
1208     return target_->Read(n, options, result, scratch, dbg);  in Read()
1219                           Slice* result, char* scratch,  in PositionedRead()  argument
1221     return target_->PositionedRead(offset, n, options, result, scratch, dbg);  in PositionedRead()
1234                 Slice* result, char* scratch,  in Read()  argument
1236     return target_->Read(offset, n, options, result, scratch, dbg);  in Read()
1360                 Slice* result, char* scratch,  in Read()  argument
1362     return target_->Read(offset, n, options, result, scratch, dbg);  in Read()