Syntactic sugar. Consequently they don’t offer performance that could not otherwise be reached by present options. In its place, these new features allow for a far more expressive and succinct syntax for use Traditional getters and setters happen to be commonly used for a very long time in various languages. https://share.evernote.com/note/7e2bab84-8b75-5e20-2d64-f2bcf199c70b