code: func (v *Variant) String() string {
  	gc := C.g_variant_print(v.native(), gbool(false))
  	defer C.g_free(C.gpointer(gc))
  	return C.GoString((*C.char)(gc))
  }
docs: // String wraps g_variant_print().  It returns a string understood
  // by g_variant_parse().