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

class Class<E extends core::Object? = dynamic> extends core::Object {
  final field self::Class::E% field;
  constructor •(self::Class::E% field) → self::Class<self::Class::E%>
    : self::Class::field = field, super core::Object::•()
    ;
  method returnTypeVariable() → self::Class::E% {
    late self::Class::E% result = this.{self::Class::field}{self::Class::E%};
    return result;
  }
}
static method returnNonNullable(core::int value) → core::int {
  late core::int result = value;
  return result;
}
static method returnNullable(core::int? value) → core::int? {
  late core::int? result = value;
  return result;
}
static method main() → dynamic {
  self::expect(42, new self::Class::•<core::int>(42).{self::Class::returnTypeVariable}(){() → core::int});
  self::expect(87, new self::Class::•<core::int?>(87).{self::Class::returnTypeVariable}(){() → core::int?});
  self::expect(null, new self::Class::•<core::int?>(null).{self::Class::returnTypeVariable}(){() → core::int?});
  self::expect(42, self::returnNonNullable(42));
  self::expect(87, self::returnNullable(87));
  self::expect(null, self::returnNullable(null));
}
static method expect(dynamic expected, dynamic actual) → dynamic {
  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
    throw "Expected ${expected}, actual ${actual}";
}