@NotNull
  @NlsSafe
  public String getSDKVersion(PsiElement psiElement) {
    final Module module = ModuleUtilCore.findModuleForPsiElement(psiElement);
    if (module == null) {
      return NO_VERSION;
    }
    final String s = getSDKVersion(module);
    return s != null ? s : NO_VERSION;
  }
@NotNull
  @NlsSafe
  public String getSDKVersion(PsiElement psiElement)