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

class Foo<S extends core::num = core::num> extends core::Object {
  synthetic constructor •() → self::Foo<self::Foo::S>
    : super core::Object::•()
    ;
  method test1(generic-covariant-impl self::Foo::S x) → void {
    (self::Foo::S) → self::Foo::S f = self::Test|get#test<self::Foo::S>(x);
  }
}
extension Test<T extends core::Object? = dynamic> on T% {
  get test = self::Test|get#test;
}
static method Test|get#test<T extends core::Object? = dynamic>(lowered final self::Test|get#test::T% #this) → (self::Test|get#test::T%) → self::Test|get#test::T%
  return (self::Test|get#test::T% a) → self::Test|get#test::T% => #this;
static method main() → void {}