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

class C extends core::Object {
  field core::String m;
  synthetic constructor •() → self::C
    ;
  set setter(core::String v) → void
    ;
  operator []=(core::int index, core::String value) → void
    ;
}
extension _extension#0 on self::C? {
  operator []= = self::_extension#0|[]=;
  set setter = self::_extension#0|set#setter;
}
static method _extension#0|set#setter(final self::C? #this, core::String v) → void
  ;
static method _extension#0|[]=(final self::C? #this, core::int index, core::String value) → void
  ;
static method main() → dynamic
  ;
static method expect(dynamic expected, dynamic actual) → dynamic
  ;