Untangle Row Bookmarks in Jython

def untangle_row_bookmarks(self, doc):
        bookmarks = doc.getRange().getBookmarks()
        bookmarks_count = bookmarks.getCount()
        x = 0
        while x < bookmarks_count:
            bookmark = bookmarks.get(x)

            # Get the parent row of both the bookmark and bookmark end node.
            row1 = bookmark.getBookmarkStart().getAncestor(Row)
            row2 = bookmark.getBookmarkEnd().getAncestor(Row)
    
            # If both rows are found okay and the bookmark start and end are contained
            # in adjacent rows, then just move the bookmark end node to the end
            # of the last paragraph in the last cell of the top row.
            if row1 is not None and row2 is not None and row1.getNextSibling() == row2:
                row1.getLastCell().getLastParagraph().appendChild(bookmark.getBookmarkEnd())
            x = x + 1