human
Solve the following python programming problem given the following code:
def receiver(queue_name = None, **kwargs) : 
    'Registers decorated function as SQS message receiver.' 
    def _decorator(fn) : 
        qn = (queue_name or ('%s__%s' % (fn.__module__.replace ('.', '__'), fn.__name__))) 
        return register (qn, fn, ** kwargs).get_receiver_proxy () 
return queue_name 

    
    

    Fix the buggy line: return queue_name
assistant
#Here is Python code to fix the buggy line: return queue_name
.

return def _decorator(