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

class Class<T extends core::Object? = dynamic> extends core::Object {
  synthetic constructor •() → self::Class<self::Class::T%>
    : super core::Object::•()
    ;
  method method(covariant-by-class self::Class::T% a) → self::Class::T%
    return a;
}
extension Extension<T extends core::Object? = dynamic> on self::Class<T%> {
  method call = self::Extension|call;
  tearoff call = self::Extension|get#call;
}
static method Extension|call<T extends core::Object? = dynamic>(lowered final self::Class<self::Extension|call::T%> #this, self::Extension|call::T% a) → self::Extension|call::T%
  return #this.{self::Class::method}(a){(self::Extension|call::T%) → self::Extension|call::T%};
static method Extension|get#call<T extends core::Object? = dynamic>(lowered final self::Class<self::Extension|get#call::T%> #this) → (self::Extension|get#call::T%) → self::Extension|get#call::T%
  return (self::Extension|get#call::T% a) → self::Extension|get#call::T% => self::Extension|call<self::Extension|get#call::T%>(#this, a);
static method main() → dynamic {
  self::Class<core::int> c = new self::Class::•<core::int>();
  self::expect(42, self::Extension|call<core::int>(c, 42));
  self::expect(87, self::Extension|call<core::int>(c, 87));
  self::expect(123, self::Extension|call<core::int>(c, 123));
  self::expect(42, self::Extension|call<core::int>(c, 42));
  self::expect(87, self::Extension|call<core::int>(c, 87));
  self::expect(123, self::Extension|call<core::int>(c, 123));
}
static method expect(dynamic expected, dynamic actual) → dynamic {
  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual)) {
    throw "Mismatch: expected=${expected}, actual=${actual}";
  }
}