library /*isNonNullableByDefault*/;
import self as self;
import "dart:core" as core;

abstract class B extends core::Object {
  synthetic constructor •() → self::B
    ;
  abstract get f() → core::String;
}
class A extends core::Object implements self::B {
  final field core::String f;
  constructor •(core::String f) → self::A
    ;
}
static field self::A a;
static method main() → dynamic
  ;