How do I propose a language change? One thing I'd really like to see is optional type declarations in Lambdas to bulletproof them. Take this simple Lambda

   List<String> names = new ArrayList<>();
   names.stream().filter(String name -> "Bob Vance".equals(name)).findFirst().get();

By adding the String type declaration, a whole host of bugs in really complicated Lambdas can be eliminated and found easier when the original types and lists are being shuffled around