What happens when you try to freeze a proxy object?
When freezing a proxy object, the behavior depends on the proxy's trap implementations: 1) Object.freeze() calls the proxy's preventExtensions trap, 2) The default behavior forwards to the target object, potentially freezing it, 3) Custom preventExtensions traps might implement different behaviors, 4) Some combinations of traps and target object modifications can cause TypeError, 5) A proxy with a revocable reference can't be frozen after revocation, 6) This is one of the more complex interactions in JavaScript's object system, 7) Generally, it's clearer to freeze the target object directly rather than through a proxy.