presto-main/src/main/java/io/prestosql/operator/GroupByIdBlock.java/GroupByIdBlock/equals
class GroupByIdBlock:    @Override
    public boolean equals(int position, int offset, Block otherBlock, int otherPosition, int otherOffset, int length)
    {
        return block.equals(position, offset, otherBlock, otherPosition, otherOffset, length);
    }