public static @Nullable PySkeletonsNode create(@NotNull Project project, @NotNull Sdk sdk, ViewSettings settings) {
    final VirtualFile skeletonsVirtualFile = PythonSdkUtil.findSkeletonsDir(sdk);
    if (skeletonsVirtualFile != null) {
      final PsiDirectory skeletonsDirectory = PsiManager.getInstance(project).findDirectory(skeletonsVirtualFile);
      if (skeletonsDirectory != null) {
        return new PySkeletonsNode(project, skeletonsDirectory, settings);
      }
    }
    return null;
  }
public static @Nullable PySkeletonsNode create(@NotNull Project project, @NotNull Sdk sdk, ViewSettings settings)