private static @NotNull PsiAnnotation correctAnnotation(@NotNull PsiAnnotation annotation) {
    Project project = annotation.getProject();
    NullableNotNullManager nnnm = NullableNotNullManager.getInstance(project);
    PsiAnnotation corrected = null;
    if (annotation.hasQualifiedName(AnnotationUtil.NULLABLE)) {
      corrected = createAnnotation(project, nnnm.getDefaultNullable());
    }
    else if (annotation.hasQualifiedName(AnnotationUtil.NOT_NULL)) {
      corrected = createAnnotation(project, nnnm.getDefaultNotNull());
    }
    return corrected != null ? corrected : annotation;
  }
private static @NotNull PsiAnnotation correctAnnotation(@NotNull PsiAnnotation annotation)