human
Solve the following python programming problem given the following code:
def mud_action(verbs, msg_class = None, **kwargs) : 
    def dec_wrapper(func) : 
        action = make_action (func, msg_class = msg_class, ** kwargs) 
        for verb in convert_verbs (verbs) : 
            if (verb in _mud_actions) : 
                error ('Adding mud action for existing verb {}', verb) 
else : 
                _mud_actions [verb] = action 
return msg_class 

    
    

    Fix the buggy line: return msg_class
assistant
#Here is Python program to fix the buggy line: return msg_class
.

return def dec_wrapper(