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

class C extends core::Object {
  synthetic constructor •() → self::C
    ;
  method m<T extends core::Object? = dynamic>(self::C::m::T% x) → self::C::m::T%
    ;
}
class D extends self::C {
  synthetic constructor •() → self::D
    ;
  method m<S extends core::Object? = dynamic>(self::D::m::S% x) → self::D::m::S%
    ;
}
static method main() → dynamic
  ;