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

class C extends self::B {
  constructor •() → self::C
    ;
}
class B extends core::Object {
  constructor •(core::int x) → self::B
    ;
}
static method f<T extends core::Object? = dynamic>() → self::f::T%
  ;
static method main() → dynamic
  ;