human
Solve the following python programming problem given the following code:
def _add_adder(self) : 
    '
        Add an ``_add_x()`` method to the element class for this child
        element.
        ' 
    def _add_child(obj, **attrs) : 
        new_method = getattr (obj, self._new_method_name) 
        child = new_method () 
        for (key, value) in attrs.items () : 
            setattr (child, key, value) 
insert_method = getattr (obj, self._insert_method_name) 
        insert_method (child) 
        return child 
_add_child.__doc__ = ('Add a new ``<%s>`` child element unconditionally, inserted in the correct sequence.' % self._nsptagname) 
    self._add_to_class (_add_child._add_method_name, _add_child) 

    
    

    Fix the buggy line: self._add_to_class (_add_child._add_method_name, _add_child)
assistant
#Here is Python code to fix the buggy line: self.

self._add_to_class (self._add_method_name, _add_child)