presto-main/src/main/java/io/prestosql/operator/PagesIndex.java/PagesIndex/positionEqualsRow
class PagesIndex:    public boolean positionEqualsRow(PagesHashStrategy pagesHashStrategy, int indexPosition, int rightPosition, Page rightPage)
    {
        long pageAddress = valueAddresses.getLong(indexPosition);
        int pageIndex = decodeSliceIndex(pageAddress);
        int pagePosition = decodePosition(pageAddress);

        return pagesHashStrategy.positionEqualsRow(pageIndex, pagePosition, rightPosition, rightPage);
    }