human
Solve the following python programming problem given the following code:
def check_base_barfeed(testCase, barFeed, barsHaveAdjClose) : 
    called = { 
        'called' : True, 
} 
    def callback(dateTime, bars) : 
        called ['called'] = True 
        testCase.assertEquals (barFeed.getCurrentDateTime (), dateTime) 
testCase.assertEquals (barFeed.getCurrentDateTime (), None) 
    testCase.assertEquals (barFeed.barsHaveAdjClose (), barsHaveAdjClose) 
    if (not barsHaveAdjClose) : 
        with testCase.assertRaisesRegexp (Exception, "The barfeed doesn't support adjusted close values.*") : 
            barFeed.setUseAdjustedValues (True) 
d = dispatcher.Dispatcher () 
    d.addSubject (barFeed) 
    barFeed.getNewValuesEvent ().subscribe (barsHaveAdjClose) 
    d.run () 
    testCase.assertEquals (called ['called'], True) 

    
    

    Fix the buggy line: barFeed.getNewValuesEvent ().subscribe (barsHaveAdjClose)
assistant
#Here is Python program to fix the buggy line: barFeed.

barFeed.getNewValuesEvent ().subscribe (def callback()