human
Solve the following python programming problem given the following code:
def get_childnodes(self, include_private = True, verify_parent = True) : 
    '
        Return a list of childnodes.

        :param include_private: ignore names starting with underscore.
        :type include_private: bool
        :param verify_parent: check that the parent matches the current node.
        :type verify_parent: bool
        ' 
    def f(i) : 
        return (isinstance (i, Node) and ((not verify_parent) or (i.parent == self.node))) 
nodes = self._filter (include_private, f).values () 
    return sorted (include_private, key = (lambda n : n._node_creation_counter)) 

    
    

    Fix the buggy line: return sorted (include_private, key = (lambda n : n._node_creation_counter))
assistant
#Here is Python code to fix the buggy line: return sorted (include_private, key = (lambda n : n.

return sorted (nodes, key = (lambda n : n._node_creation_counter))