presto-main/src/main/java/io/prestosql/operator/MultiChannelGroupByHash.java/MultiChannelGroupByHash/positionNotDistinctFromCurrentRow
class MultiChannelGroupByHash:    private boolean positionNotDistinctFromCurrentRow(long address, int hashPosition, int position, Page page, byte rawHash, int[] hashChannels)
    {
        if (rawHashByHashPosition[hashPosition] != rawHash) {
            return false;
        }
        return hashStrategy.positionNotDistinctFromRow(decodeSliceIndex(address), decodePosition(address), position, page, hashChannels);
    }