human
Solve the following python programming problem given the following code:
def _add_inserter(self) : 
    '
        Add an ``_insert_x()`` method to the element class for this child
        element.
        ' 
    def _insert_child(obj, child) : 
        obj.insert_element_before (child, * self._successors) 
        return child 
_insert_child.__doc__ = ('Return the passed ``<%s>`` element after inserting it as a child in the correct sequence.' % self._nsptagname) 
    self._add_to_class (self._insert_method_name, self) 

    
    

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

self._add_to_class (self._insert_method_name, _insert_child)