message: [examples] Update to show `env.emit` inside non-message function
diff: @@ -52,6 +52,12 @@ contract! {
  ///
  /// Also emits an event.
  pub(external) fn dec(&mut self) {
  + self.dec_internal(env);
  + }
  + }
  +
  + impl CallCounter {
  + fn dec_internal(&mut self, env: &mut ink_model::EnvHandler) {
  self.count -= 1;
  env.emit(DecCalled { current: *self.count });
  }
  