fontbox/src/main/java/org/apache/fontbox/ttf/gsub/GsubWorkerForGujarati.java [148:175]:
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    private List<Integer> repositionGlyphs(List<Integer> originalGlyphIds)
    {
        List<Integer> repositionedGlyphIds = new ArrayList<>(originalGlyphIds);
        int listSize = repositionedGlyphIds.size();
        int foundIndex = listSize - 1;
        int nextIndex = listSize - 2;
        while (nextIndex > -1)
        {
            int glyph = repositionedGlyphIds.get(foundIndex);
            int prevIndex = foundIndex + 1;
            if (beforeHalfGlyphIds.contains(glyph))
            {
                repositionedGlyphIds.remove(foundIndex);
                repositionedGlyphIds.add(nextIndex--, glyph);
            }
            else if (rephGlyphIds.get(1).equals(glyph) && prevIndex < listSize)
            {
                int prevGlyph = repositionedGlyphIds.get(prevIndex);
                if (beforeHalfGlyphIds.contains(prevGlyph))
                {
                    repositionedGlyphIds.remove(prevIndex);
                    repositionedGlyphIds.add(nextIndex--, prevGlyph);
                }
            }
            foundIndex = nextIndex--;
        }
        return repositionedGlyphIds;
    }
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fontbox/src/main/java/org/apache/fontbox/ttf/gsub/GsubWorkerForDevanagari.java [178:205]:
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    private List<Integer> repositionGlyphs(List<Integer> originalGlyphIds)
    {
        List<Integer> repositionedGlyphIds = new ArrayList<>(originalGlyphIds);
        int listSize = repositionedGlyphIds.size();
        int foundIndex = listSize - 1;
        int nextIndex = listSize - 2;
        while (nextIndex > -1)
        {
            int glyph = repositionedGlyphIds.get(foundIndex);
            int prevIndex = foundIndex + 1;
            if (beforeHalfGlyphIds.contains(glyph))
            {
                repositionedGlyphIds.remove(foundIndex);
                repositionedGlyphIds.add(nextIndex--, glyph);
            }
            else if (rephGlyphIds.get(1).equals(glyph) && prevIndex < listSize)
            {
                int prevGlyph = repositionedGlyphIds.get(prevIndex);
                if (beforeHalfGlyphIds.contains(prevGlyph))
                {
                    repositionedGlyphIds.remove(prevIndex);
                    repositionedGlyphIds.add(nextIndex--, prevGlyph);
                }
            }
            foundIndex = nextIndex--;
        }
        return repositionedGlyphIds;
    }
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