private static void addSourcePaths(Set<String> paths, DataNode<? extends ModuleData> moduleNode) {
    getChildren(moduleNode, ProjectKeys.CONTENT_ROOT)
      .stream()
      .flatMap(contentNode -> contentNode.getData().getPaths(ExternalSystemSourceType.SOURCE).stream())
      .map(ContentRootData.SourceRoot::getPath)
      .forEach(paths::add);
  }
private static void addSourcePaths(Set<String> paths, DataNode<? extends ModuleData> moduleNode)