Provided by: libfontconfig-doc_2.15.0-2.2ubuntu1_all 

NAME
FcStrSetAdd - add to a string set
SYNOPSIS
#include <fontconfig/fontconfig.h> FcBool FcStrSetAdd (FcStrSet *set, const FcChar8 *s);
DESCRIPTION
Adds a copy of s to set. Fontconfig 2.15.0 23 March 2025 FcStrSetAdd(3)