@Override
    public ExplorerNode updateTags(final ExplorerNode explorerNode) {
        Objects.requireNonNull(explorerNode);
        final DocRef docRef = explorerNode.getDocRef();
        return updateTags(docRef, explorerNode.getTags());
    }
Create a map of folders and their child items.
stroom-explorer/stroom-explorer-impl/src/main/java/stroom/explorer/impl/ExplorerServiceImpl.java