In addition to supporting the nodes, the notion of Binder is
reworked. It doesn't store the computed local distinct name on the
node itself now, as it's not always possible (which is the case of
LabeledStatement), but keep it in a map.
Change-Id: I04c08875cbcac3a547d62afbe5b17f023e6f1035
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/153342
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Dmitry Stefantsov
da8712394b