class FDB::Transaction

def add_read_conflict_range(bkey, ekey)
  bkey = FDB.key_to_bytes(bkey)
  ekey = FDB.key_to_bytes(ekey)
  FDBC.check_error FDBC.fdb_transaction_add_conflict_range(@tpointer, bkey, bkey.bytesize, ekey, ekey.bytesize, @@ConflictRangeType["READ"][0])
end