I think so?  You might be thinking in PHP-specific terms I'm not familiar with.

As an example, though, I recently wrote a class for my day job that had a public `value` prop and a private `_value` state.  Changes to `value` updated `_value`, but not vice-versa, because the public one had a change listener and I needed a way to change it without triggering the listener.

However, were it not for that case, I would have just used a single class property `value` with no explicit getters or setters, because TypeScript defines get and set behavior by default on classes, without the need for developer code. 

 Hmm. I don't think PHP does that.