How do I check if a PDF font contains a given char code?

Q: How do I check if a PDF font contains a given char code?
I have some problems on some files where the font is included, but
inside the font the Glyph of a specific character is not really
included.
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A: You can use Font.GetGlyphPath() to determine if a font contains a
given char code. If the function returns false the font does not
contain a glyph. In case of JAVA you would check GlyphPath.identified
returned from GetGlyphPath().