code: def is_authoring_node(self, node):
          
  
          for parent_node in foundations.walkers.nodes_walker(node, ascendants=True):
              if parent_node is self.__default_project_node:
                  return True
          return False
docs: Returns if given Node is an authoring node.
  
          :param node: Node.
          :type node: ProjectNode or DirectoryNode or FileNode
          :return: Is authoring node.
          :rtype: bool