+ " If the glyph is not available, return an empty stencil.\n"
+ "\n"
+ "Note that this command can only be used to access glyphs from"
+ " fonts loaded with @code{ly:system-font-load}; currently, this"
+ " means either the Emmentaler or Aybabtu fonts, corresponding"
+ " to the font encodings @code{fetaMusic} and @code{fetaBraces},"
+ " respectively.")