Nothing
glyphs <- scaled_font$textToGlyphs(x, y, utf8, utf8_len)
if (glyphs$retval == CairoStatus["success"])
cr$showTextGlyphs(utf8, utf8_len,
glyphs$glyphs, glyphs$num_glyphs,
glyphs$clusters, glyphs$num_clusters,
glyphs$cluster_flags)
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