private static boolean isNestedClassOf(PsiJavaCodeReferenceElement classReference, UsageTarget @NotNull [] targets) {
    if (classReference instanceof PsiMethodReferenceExpression) return false;
    final PsiElement qualifier = classReference.getQualifier();
    if (qualifier instanceof PsiJavaCodeReferenceElement) {
      return qualifiesToTargetClasses((PsiJavaCodeReferenceElement)qualifier, targets) && classReference.resolve() instanceof PsiClass;
    }
    return false;
  }
private static boolean isNestedClassOf(PsiJavaCodeReferenceElement classReference, UsageTarget @NotNull [] targets)