[XeTeX] Printing OTF glyph features

[Stephan]

Good day,

I have been trying to print out the glyphs of a font (in my case Minion) that 
are used in a stylistic variant. But I have not been able to do that...

Is there a way of printing, let's say, all the glyphs that would be used if a 
feature in a font is turned on ?

For example, the "k" in this stylistic variant is different from the regular 
"k" in the Minion font, however, I would like to know what other glyphs may be 
affected.

Thanks,

-Stephan