library test;
import self as self;
import "dart:core" as core;

class F3<T extends core::Object = dynamic> extends core::Object {
  constructor •(core::Iterable<core::Iterable<self::F3::T>> a) → self::F3<self::F3::T>
    : super core::Object::•() {}
}
class F4<T extends core::Object = dynamic> extends core::Object {
  constructor •({core::Iterable<core::Iterable<self::F4::T>> a = null}) → self::F4<self::F4::T>
    : super core::Object::•() {}
}
static method main() → void {
  new self::F3::•<dynamic>(<dynamic>[]);
  new self::F4::•<dynamic>(a: <dynamic>[]);
}