}
aggregates = builder.build();
// create hash table
hashStrategy = new SliceHashStrategy(groupByTupleInfo);
addressToGroupId = new Long2IntOpenCustomHashMap(expectedGroups, hashStrategy);
// initialize hash table
addressToGroupId.defaultReturnValue(-1);
Slice slice = Slices.allocate((int) BlockBuilder.DEFAULT_MAX_BLOCK_SIZE.toBytes());
hashStrategy.addSlice(slice);