public void ifMyProblem(NullabilityProblem<?> problem, Consumer<? super T> consumer) {
    NullabilityProblem<T> myProblem = asMyProblem(problem);
    if (myProblem != null) {
      consumer.accept(myProblem.getAnchor());
    }
  }
public void ifMyProblem(NullabilityProblem<?> problem, Consumer<? super T> consumer)