private void registerSuppressedElements(@NotNull PsiElement element, @NotNull String id, @Nullable String alternativeID) {
    mySuppressedElements.computeIfAbsent(id, __ -> new HashSet<>()).add(element);
    if (alternativeID != null && !alternativeID.equals(id)) {
      mySuppressedElements.computeIfAbsent(alternativeID, __ -> new HashSet<>()).add(element);
    }
  }
private void registerSuppressedElements(@NotNull PsiElement element, @NotNull String id, @Nullable String alternativeID)