human
Solve the following python programming problem given the following code:
def SleepHandler(* throttle_names) : 
    def SleepOnThrottles(self, request, response) : 
        if throttle_names : 
            for throttle_name in throttle_names : 
                self._DatastoreThrottler__throttle.Sleep (throttle_name) 
else : 
            self._DatastoreThrottler__throttle.Sleep () 
return <MASK> 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: throttle_names
assistant
#Here is a proper replacement for <MASK>.
def SleepOnThrottles(