code: def unregister_project_nodes(self, node):
          
  
          for node in reversed(list(foundations.walkers.nodes_walker(node))):
              if node.family == "Directory":
                  self.unregister_directory(node)
              elif node.family == "File":
                  self.unregister_file(node)
docs: Unregisters given Node children.
  
          :param node: Node.
          :type node: ProjectNode or DirectoryNode