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

class A extends core::Object {
  synthetic constructor •() → self::A
    ;
  operator [](core::int index) → core::String
    ;
  operator []=(core::int index, core::String value) → void
    ;
}
class B extends self::A {
  synthetic constructor •() → self::B
    ;
  method test() → void
    ;
}
extension E on core::String {
  get foo = self::E|get#foo;
  operator []= = self::E|[]=;
  operator [] = self::E|[];
}
static method E|get#foo(lowered final core::String #this) → core::int
  ;
static method E|[]=(lowered final core::String #this, core::int index, core::int value) → void
  ;
static method E|[](lowered final core::String #this, core::int index) → core::int
  ;
static method warning(core::String s, core::List<core::String> l, core::Map<core::String, core::int> m) → dynamic
  ;
static method main() → dynamic
  ;