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

abstract class T0 extends core::Object {
  synthetic constructor •() → self::T0
    : super core::Object::•()
    ;
  abstract method foo() → void;
}
class T2 extends self::T0 {
  synthetic constructor •() → self::T2
    : super self::T0::•()
    ;
[@vm.procedure-attributes.metadata=hasDynamicUses:false,hasThisUses:false,hasTearOffUses:false]  method foo() → void {}
}
class A extends core::Object {
  synthetic constructor •() → self::A
    : super core::Object::•()
    ;
[@vm.procedure-attributes.metadata=hasDynamicUses:false,hasThisUses:false,hasNonThisUses:false]  method method1(self::T0 t0) → void {
    [@vm.direct-call.metadata=#lib::T2::foo??] [@vm.inferred-type.metadata=!? (skip check)] t0.{self::T0::foo}();
  }
}
abstract class B extends core::Object {
  abstract method method2(covariant dynamic arg) → void;
}
class C extends core::Object implements self::B {
  synthetic constructor •() → self::C
    : super core::Object::•()
    ;
[@vm.procedure-attributes.metadata=hasDynamicUses:false,hasThisUses:false,hasTearOffUses:false]  method method2(covariant self::T0 t0) → void {
    [@vm.direct-call.metadata=#lib::T2::foo??] [@vm.inferred-type.metadata=!? (skip check)] t0.{self::T0::foo}();
  }
}
class D extends core::Object {
  synthetic constructor •() → self::D
    : super core::Object::•()
    ;
[@vm.procedure-attributes.metadata=hasThisUses:false,hasTearOffUses:false]  method method3(self::T0 t0) → void {
    [@vm.direct-call.metadata=#lib::T2::foo??] [@vm.inferred-type.metadata=!? (skip check)] t0.{self::T0::foo}();
  }
}
[@vm.inferred-type.metadata=dart.core::Null?]static field core::Function unknown;
static method func1([@vm.inferred-type.metadata=#lib::T2?] self::T0 t0) → void {
  [@vm.direct-call.metadata=#lib::T2::foo??] [@vm.inferred-type.metadata=!? (skip check)] t0.{self::T0::foo}();
}
static method func2(self::T0 t0) → void {
  [@vm.direct-call.metadata=#lib::T2::foo??] [@vm.inferred-type.metadata=!? (skip check)] t0.{self::T0::foo}();
}
static method getDynamic() → dynamic
  return [@vm.call-site-attributes.metadata=receiverType:dart.core::Function] self::unknown.call();
static method use(dynamic x) → dynamic
  return [@vm.call-site-attributes.metadata=receiverType:dart.core::Function] self::unknown.call(x);
static method main(core::List<core::String> args) → dynamic {
  self::func1(self::getDynamic() as{TypeError} self::T0);
  self::use(self::func2);
  self::use(new self::A::•().{self::A::method1});
  self::B bb = self::getDynamic() as{TypeError} self::B;
  [@vm.direct-call.metadata=#lib::C::method2??] [@vm.inferred-type.metadata=!? (skip check)] bb.{self::B::method2}(self::getDynamic());
  self::getDynamic().method3(self::getDynamic());
  new self::T2::•();
  new self::A::•();
  new self::C::•();
  new self::D::•();
}