human
Solve the following python programming problem given the following code:
def test_mutabledisposable_dispose() : 
    disp = [False] 
    m = SerialDisposable () 
    def action() : 
        disp [0] = True 
d = Disposable (disp) 
    m.disposable = d 
    assert (d == m.disposable) 
    assert (not disp [0]) 
    m.dispose () 
    assert disp [0] 
    assert (m.disposable == None) 

    
    

    Fix the buggy line: d = Disposable (disp)
assistant
#Here is Python code to fix the buggy line: d = Disposable (disp)
.

d = Disposable (def action()