private static @Nullable Nullability getJsr305QualifierNullability(@NotNull PsiAnnotation qualifier) {
    String qName = qualifier.getQualifiedName();
    if (qName == null) return null;
    NullableNotNullManager manager = NullableNotNullManager.getInstance(qualifier.getProject());
    if (qName.equals(JAVAX_ANNOTATION_NULLABLE) && manager.getNullables().contains(qName)) {
      return Nullability.NULLABLE;
    }
    if (qName.equals(JAVAX_ANNOTATION_NONNULL)) return extractNullityFromWhenValue(qualifier);
    return manager.getAnnotationNullability(qName).orElse(null);
  }
private static @Nullable Nullability getJsr305QualifierNullability(@NotNull PsiAnnotation qualifier)