Is your feature request related to a problem? Please describe.

Eclipse has a nice feature where clicking on either a return statement or the return type of a function, all the exit points of the function are highlighted (whether they are return statements, throw statements, etc.).

Dart doesn't have checked exceptions, so doing this in Dart won't give the user a complete view of all the ways a function can exit (well, to be fair, Java also has unchecked exceptions, so it's not complete for Java either) -- but even being able to easily spot most of the return points in Dart would be really helpful.