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If you really did have a case where your list is a list of apples, wouldn't you type:

List<Apple> apples = aps

If you're using a general type Fruit, and can't stand any fruit that isn't an apple, you probably need to use the more specific Apple type.

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I mean, the problem of assigning `fruits = aps` is not that you get apples in your fruit list, but that now elements added to fruit (not of apple type) also get added to `aps`.

The assignment sort of goes both ways like that.

Ah, your point makes more sense now. Immutability would help a lot here, it seems.

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