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

class Foo extends core::Object {
  constructor •() → void
    : super core::Object::•()
    ;
  method method(dynamic/core::int* {int} x, [dynamic/core::int* {null,int} y, dynamic/core::int* {null,int} z]) → dynamic/core::String* {string} {
    return "string";
  }
}
abstract class External extends core::Object {
  constructor •() → void
    : super core::Object::•()
    ;
  abstract method externalMethod(core::int/<missing type> x, [core::int/<missing type> y, core::int/<missing type> z]) → core::String/<missing type>;
  abstract method listen(self::Listener/<missing type> listener) → void/<missing type>;
}
abstract class Listener extends core::Object {
  constructor •() → void
    : super core::Object::•()
    ;
  abstract method event(core::String/<missing type> input, [core::int/<missing type> x, core::int/<missing type> y]) → void/<missing type>;
}
class TestListener extends self::Listener {
  constructor •() → void
    : super self::Listener::•()
    ;
  method event(dynamic/core::String* {string} input, [dynamic/core::int* {null,int} x, dynamic/core::int* {null,int} y]) → void/Null {}
}
class ExtendedListener extends self::Listener {
  constructor •() → void
    : super self::Listener::•()
    ;
  method event(dynamic/core::String* {string} input, [dynamic/core::int* {null,int} x, dynamic/core::int* {null,int} y, dynamic/Null z]) → void/Null {}
}
class InvalidListener extends core::Object {
  constructor •() → void
    : super core::Object::•()
    ;
  method event(dynamic/core::String* {string} input, [dynamic/core::int* {null,int} x]) → void/Null {}
}
external static method createExternal() → self::External/self::External* {other};
static method main() → dynamic/Null {
  dynamic/self::Foo! {other} foo = new self::Foo::•();
  dynamic/core::String* {string} string1 = foo.method(1);
  dynamic/core::String* {string} string2 = foo.method(1, 2);
  dynamic/core::String* {string} string3 = foo.method(1, 2, 3);
  dynamic/self::External* {other} extern = self::createExternal();
  dynamic/core::String* {string} string4 = extern.externalMethod(1);
  dynamic/core::String* {string} string5 = extern.externalMethod(1, 2);
  dynamic/core::String* {string} string6 = extern.externalMethod(1, 2, 3);
  extern.listen(new self::TestListener::•());
  extern.listen(new self::ExtendedListener::•());
  extern.listen(new self::InvalidListener::•());
  dynamic/Nothing nothing1 = foo.method();
  dynamic/Nothing nothing2 = foo.method(1, 2, 3, 4);
  dynamic/Nothing nothing3 = extern.externalMethod();
  dynamic/Nothing nothing4 = extern.externalMethod(1, 2, 3, 4);
}