Program
Repair Shop 
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Repair Shop |
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If we omit line 170, then observers of Class::Observable are not considered observers of Alarm
But nobody was going to add an observer to Class::Observable anyway
Or if they did, why shouldn't it observe all the derived objects?
In fact, such a mechanism might be useful for debugging
Possibly more useful than all that ->observer_log stuff
So why go out of our way to rule it out?
Avoid special cases
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