private void addExceptionInducer(final @NotNull PsiType exception, final @NotNull PsiElement inducer) {
        final Set<@NotNull PsiElement> inducers = exceptionToInducers.computeIfAbsent(exception, k -> new HashSet<>());
        inducers.add(inducer);
      }
private void addExceptionInducer(final @NotNull PsiType exception, final @NotNull PsiElement inducer)