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

class C<T extends core::Object? = dynamic> extends core::Object {
  covariant-by-class field self::C::T? t = null;
  constructor •() → self::C<self::C::T%>
    : super core::Object::•()
    ;
  static factory named<T extends core::Object? = dynamic>(self::C::named::T% t) → self::C<self::C::named::T%> {
    self::C<self::C::named::T%> x = new self::C::•<self::C::named::T%>();
    x.{self::C::t} = t;
    return x;
  }
}
static method main() → dynamic {
  self::C<core::int> x = self::C::named<core::int>(42);
}