Method IsBuiltInFont

src/tests/mock_fontcache.h:30–30

	GlyphID MapCharToGlyph(char32_t key, [[maybe_unused]] bool allow_fallback = true) override { return key; }
	std::string GetFontName() override { return "mock"; }
	bool IsBuiltInFont() override { return true; }

	static void InitializeFontCaches()
	{