library /*isNonNullableByDefault*/;
import self as self;
import "dart:core" as core;

class A extends core::Object {
  synthetic constructor •() → self::A
    ;
  method method1({required core::int a}) → void
    ;
  method method2({core::int? a, required core::int b}) → void
    ;
}
class B extends core::Object {
  synthetic constructor •() → self::B
    ;
  method method1({required covariant core::int a}) → void
    ;
  method method2({covariant core::int? a, required core::int b}) → void
    ;
}
class C extends self::A implements self::B {
  synthetic constructor •() → self::C
    ;
  forwarding-stub method method1({required covariant core::int a}) → void
    return super.{self::A::method1}(a: a);
  forwarding-stub method method2({covariant core::int? a, required core::int b}) → void
    return super.{self::A::method2}(a: a, b: b);
}
class D extends self::C {
  synthetic constructor •() → self::D
    ;
  method method1({required covariant core::int a}) → void
    ;
  method method2({covariant core::int? a, required core::int b}) → void
    ;
}
static method main() → dynamic
  ;