Syntactic sugar. This means that they don’t give performance that could not or else be obtained by means of existing features. As an alternative, these new options allow a more expressive and succinct syntax to be used Fields have a "visibility" this determines what other classes can see the field, https://www.tumblr.com/navrajinfratechgurgaon/785120963510534144/luxury-rises-beyond-limits-m3m-altitude-gurgaon?source=share