public @Nullable PsiAnnotation copyNullableOrNotNullAnnotation(@NotNull PsiModifierListOwner original, @NotNull PsiModifierListOwner generated) {
    NullabilityAnnotationInfo src = findOwnNullabilityInfo(original);
    if (src == null) return null;
    NullabilityAnnotationInfo effective = findEffectiveNullabilityInfo(generated);
    if (effective != null && effective.getNullability() == src.getNullability()) return null;
    return copyAnnotation(src.getAnnotation(), generated);
  }
public @Nullable PsiAnnotation copyNullableOrNotNullAnnotation(@NotNull PsiModifierListOwner original, @NotNull PsiModifierListOwner generated)