Function librocksdbsys::crocksdb_writebatch_iterate

pub unsafe extern "C" fn crocksdb_writebatch_iterate(
    batch: *mut DBWriteBatch, 
    state: *mut c_void, 
    put_fn: extern "C" fn(state: *mut c_void, k: *const u8, klen: size_t, v: *const u8, vlen: size_t), 
    deleted_fn: extern "C" fn(state: *mut c_void, k: *const u8, klen: size_t)
)