def f_debug(self):
return self._debug()<EOL>
Creates a dummy object containing the whole tree to make unfolding easier.

        This method is only useful for debugging purposes.
        If you use an IDE and want to unfold the trajectory tree, you always need to
        open the private attribute `_children`. Use to this function to create a new
        object that contains the tree structure in its attributes.

        Manipulating the returned object does not change the original tree!