// Get the lookup for the node for access to its underlying content and
// blackboard artifact, if any.
Lookup lookup = selectedNode.getLookup();
// Get the content.
Content content = lookup.lookup(Content.class);
if (content == null) {
return new ViewUpdate(getArtifactContentStrings().size(), currentPage, ERROR_TEXT);
}
// Get all of the blackboard artifacts associated with the content. These are what this