library #lib;
import self as self;
import "dart:core" as core;
import "dart:async" as asy;

import "dart:async";

abstract class A extends core::Object {
  synthetic constructor •() → self::A*
    : super core::Object::•()
    ;
}
class B extends self::A {
  synthetic constructor •() → self::B*
    : super self::A::•()
    ;
}
static field dynamic usedObject;
[@vm.inferred-type.metadata=dart.core::Null? (value: null)]static field core::Function* unknown;
static method use(dynamic object) → void {
  [@vm.inferred-type.metadata=!? (receiver not int)] self::usedObject.{core::Object::==}(null) ?{dynamic} self::usedObject = object : null;
}
static method foo1_a1([@vm.inferred-type.metadata=dart.async::_Future<#lib::B*>] dynamic x) → void {
  self::use(x);
}
static method foo1_a2([@vm.inferred-type.metadata=#lib::B] dynamic x) → void {
  self::use(x);
}
static method foo1_a3([@vm.inferred-type.metadata=dart.async::_Future<#lib::B*>] dynamic x) → void {
  self::use(x);
}
static method foo1_a4([@vm.inferred-type.metadata=#lib::B] dynamic x) → void {
  self::use(x);
}
static method foo1([@vm.inferred-type.metadata=dart.async::_Future<#lib::B*>] asy::Future<self::A*>* a1, [@vm.inferred-type.metadata=#lib::B] self::A* a2, [@vm.inferred-type.metadata=dart.async::_Future<#lib::B*>] FutureOr<self::A*>* a3, [@vm.inferred-type.metadata=#lib::B] FutureOr<self::A*>* a4) → void {
  self::foo1_a1(a1);
  self::foo1_a2(a2);
  self::foo1_a3(a3);
  self::foo1_a4(a4);
}
static method foo2_a1([@vm.inferred-type.metadata=dart.async::_Future?] dynamic x) → void {
  self::use(x);
}
static method foo2_a2([@vm.inferred-type.metadata=#lib::B?] dynamic x) → void {
  self::use(x);
}
static method foo2_a3(dynamic x) → void {
  self::use(x);
}
static method foo2_a4(dynamic x) → void {
  self::use(x);
}
static method foo2([@vm.inferred-type.metadata=dart.async::_Future?] asy::Future<self::A*>* a1, [@vm.inferred-type.metadata=#lib::B?] self::A* a2, FutureOr<self::A*>* a3, FutureOr<self::A*>* a4) → void {
  self::foo2_a1(a1);
  self::foo2_a2(a2);
  self::foo2_a3(a3);
  self::foo2_a4(a4);
}
static method getDynamic() → dynamic
  return [@vm.call-site-attributes.metadata=receiverType:dart.core::Function*] self::unknown.call();
static method main(core::List<core::String*>* args) → dynamic {
  self::foo1([@vm.inferred-type.metadata=dart.async::_Future<#lib::B*>] asy::Future::value<self::B*>(new self::B::•()), new self::B::•(), [@vm.inferred-type.metadata=dart.async::_Future<#lib::B*>] asy::Future::value<self::B*>(new self::B::•()), new self::B::•());
  self::foo2(self::getDynamic() as{TypeError,ForDynamic} asy::Future<self::A*>*, self::getDynamic() as{TypeError,ForDynamic} self::A*, self::getDynamic() as{TypeError,ForDynamic} FutureOr<self::A*>*, self::getDynamic() as{TypeError,ForDynamic} FutureOr<self::A*>*);
}