private @NotNull List<AnnotationData> collectDefaultConstructorExternalAnnotations(@NotNull PsiClass aClass) {
    //External annotations of default constructor are stored at the same annotations files as class' ones.
    List<PsiFile> annotationsFiles = findExternalAnnotationsFiles(aClass);
    if (annotationsFiles == null) return NO_DATA;

    String defCtrExternalName = getExternalName(aClass) + " " + aClass.getName() + "()";
    return collectExternalAnnotations(defCtrExternalName, () -> doCollect(defCtrExternalName, annotationsFiles, false));
  }
private @NotNull List<AnnotationData> collectDefaultConstructorExternalAnnotations(@NotNull PsiClass aClass)