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

class A<X extends core::Object? = dynamic> extends core::Object {
  synthetic constructor •() → self::A<self::A::X%>
    ;
  method f<R extends core::Object? = dynamic>(<X extends core::Object? = dynamic>(self::A<X%>) → self::A::f::R% f) → self::A::f::R%
    ;
}
static method main() → dynamic
  ;