Does the project has `leveldb::DumpFile` support?

[mapleFU]

Since when I'm using your library, I don't want to re-use the C++ library to dump SST files. I wonder if the leveldb project has leveldb::DumpFile support? If there is not, maybe I can add it.

[mapleFU]

Also, I didn't found GetProperty in this project, I can also implement it if the project not has the api.