List<Object> items = new ArrayList<>();
final SleuthkitCase tskCase = currentCase.getSleuthkitCase();
items.add(new DataSources());
items.add(new Views(tskCase));
items.add(new Results(tskCase));
items.add(new Reports());
contentChildren = new RootContentChildren(items);
Node root = new AbstractNode(contentChildren) {
/**
* to override the right click action in the white blank
* space area on the directory tree window