// It can be paired with makeArgSlices to make-and-store JavaScript arg slices.
func storeArgs(args []any, argValsDst []Value, argRefsDst []ref) {
	// would go in makeArgs if the combined func was simple enough to inline
	for i, arg := range args {
		v := ValueOf(arg)
		argValsDst[i] = v
		argRefsDst[i] = v.ref
	}
}

// Length returns the JavaScript property "length" of v.