code: protected void addNode( String workspaceName,
                              NodeKey key,
                              Path path,
                              Name primaryType,
                              Set<Name> mixinTypes,
                              Properties properties ) {
      }
docs: Handle the addition of a node.
  
  @param workspaceName the workspace in which the node information should be available; may not be null
  @param key the unique key for the node; may not be null
  @param path the path of the node; may not be null
  @param primaryType the primary type of the node; may not be null
  @param mixinTypes the mixin types for the node; may not be null but may be empty
  @param properties the properties of the node; may not be null but may be empty