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       FcCharSetIntersectCount - Intersect and count charsets
       #include <fontconfig.h>
       FcChar32  FcCharSetIntersectCount  (const FcCharSet *a, const FcCharSet
       *b);
       Returns the number of chars that are in both a and b.
       Fontconfig version 2.2.0
                                 21 April 2003      FcCharSetIntersectCount(3)