@Nullable
  public static Sdk findSdkForNonModuleFile(@NotNull PsiFileSystemItem psiFile) {
    final VirtualFile vfile;
    if (psiFile instanceof PsiFile) {
      final PsiFile contextFile = FileContextUtil.getContextFile(psiFile);
      vfile = contextFile != null ? contextFile.getOriginalFile().getVirtualFile() : null;
    }
    else {
      vfile = psiFile.getVirtualFile();
    }
    Sdk sdk = null;
    if (vfile != null) { // reality
      final ProjectRootManager projectRootManager = ProjectRootManager.getInstance(psiFile.getProject());
      sdk = projectRootManager.getProjectSdk();
      if (sdk == null) {
        final List<OrderEntry> orderEntries = projectRootManager.getFileIndex().getOrderEntriesForFile(vfile);
        for (OrderEntry orderEntry : orderEntries) {
          if (orderEntry instanceof JdkOrderEntry) {
            sdk = ((JdkOrderEntry)orderEntry).getJdk();
          }
          else if (OrderEntryUtil.isModuleLibraryOrderEntry(orderEntry)) {
            sdk = PythonSdkUtil.findPythonSdk(orderEntry.getOwnerModule());
          }
        }
      }
    }
    return sdk;
  }
@Nullable
  public static Sdk findSdkForNonModuleFile(@NotNull PsiFileSystemItem psiFile)