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

class A extends core::Object {
  synthetic constructor •() → self::A
    ;
}
class B extends self::A {
  synthetic constructor •() → self::B
    ;
}
class Class<T extends self::A> extends core::Object {
  synthetic constructor •() → self::Class<self::Class::T>
    ;
  method method1a(covariant-by-class self::Class::T t) → void
    ;
  method method1b(covariant-by-class self::Class::T t) → void
    ;
  method method2a(covariant-by-class self::Class::T t) → void
    ;
  method method2b(covariant-by-class self::Class::T t) → void
    ;
}
late static field core::List<self::B> xs;
late static field core::List<core::List<self::B>> xss;
static method main() → void
  ;
static method errors() → void
  ;
static method throws(() → void f) → void
  ;