library test;
import self as self;
import "dart:core" as core;

static method main() → dynamic {
  () →* core::Iterable<Null>* f = () → core::Iterable<Null>* sync* {
    yield null;
  };
  core::Iterable<dynamic>* y = f(){() →* core::Iterable<Null>*};
  core::Iterable<core::String*>* z = f(){() →* core::Iterable<Null>*};
  core::String* s = f(){() →* core::Iterable<Null>*}.{core::Iterable::first}{Null};
}