private static @NotNull List<VirtualFile> getUserAddedPaths(@NotNull Sdk sdk) {
    final SdkAdditionalData additionalData = sdk.getSdkAdditionalData();
    final PythonSdkAdditionalData pythonAdditionalData = PyUtil.as(additionalData, PythonSdkAdditionalData.class);
    return pythonAdditionalData != null ? Lists.newArrayList(pythonAdditionalData.getAddedPathFiles()) :
           Collections.emptyList();
  }
private static @NotNull List<VirtualFile> getUserAddedPaths(@NotNull Sdk sdk)