code: func FontDescriptionFromString(str string) *FontDescription {
  	cstr := C.CString(str)
  	defer C.free(unsafe.Pointer(cstr))
  	c := C.pango_font_description_from_string((*C.char)(cstr))
  	v := new(FontDescription)
  	v.pangoFontDescription = c
  	return v
  }
docs: //PangoFontDescription *pango_font_description_from_string (const char                  *str);