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 C extends self::B {
  synthetic constructor •() → self::C
    ;
}
class Foo<T extends self::A?> extends core::Object {
  synthetic constructor •() → self::Foo<self::Foo::T%>
    ;
  method doPromotionsToNullable(covariant-by-class self::Foo::T% t) → dynamic
    ;
  method doPromotionsToNonNullable(covariant-by-class self::Foo::T% t) → dynamic
    ;
}
static method main() → dynamic
  ;