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| dS ) a Simplify glyphs in TTFont by merging overlapping contours.
Overlapping components are first decomposed to simple contours, then merged.
Currently this only works with TrueType fonts with 'glyf' table.
Raises NotImplementedError if 'glyf' table is absent.
Note that removing overlaps invalidates the hinting. By default we drop hinting
from all glyphs whether or not overlaps are removed from a given one, as it would
look weird if only some glyphs are left (un)hinted.
Args:
font: input TTFont object, modified in place.
glyphNames: optional iterable of glyph names (str) to remove overlaps from.
By default, all glyphs in the font are processed.
removeHinting (bool): set to False to keep hinting for unmodified glyphs.
ignoreErrors (bool): set to True to ignore errors while removing overlaps,
thus keeping the tricky glyphs unchanged (fonttools/fonttools#2363).
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