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

static method map<T extends core::Object* = dynamic>(() →* self::map::T* f1, () →* self::map::T* f2) → self::map::T* {}
static method id<T extends core::Object* = dynamic>(self::id::T* t) → dynamic
  return t;
static method foo() → core::Null?
  return null;
static method main() → dynamic {
  self::map<core::Null?>(() → core::Null? {}, () → <BottomType>=> throw "hello");
  self::map<core::Null?>(() → <BottomType>=> throw "hello", () → core::Null? {});
  () →* core::Null? f = () → core::Null? {};
  self::map<core::Null?>(#C1, () → <BottomType>=> throw "hello");
  self::map<core::Null?>(() → <BottomType>=> throw "hello", #C1);
  self::map<core::Null?>(() → core::Null? {
    return null;
  }, () → <BottomType>=> throw "hello");
  self::map<core::Null?>(() → <BottomType>=> throw "hello", () → core::Null? {
    return null;
  });
  self::id<() →* core::Null?>(() → core::Null? {});
}

constants  {
  #C1 = tearoff self::foo
}