human
I wrote the below code

    class TrackingClosed(cls, ):
        def __init__(self, *a, **kw):
            super(TrackingClosed, self).__init__(*a, **kw)
            self.closed = False
        def close(self):
            super(TrackingClosed, self).close()
            self.closed = True
    return TrackingClosed

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def track_closed(cls):