The interface for One.Item is expecting a One.Item as an argument to its 
Less() method.
By embedding it in Two.Item, that shouldn't change that correct?

So the resulting public interface for Two.Item *after embedding* One.Item 
is technically.

type Item interface {
    Less(One.Item) bool
    Len() int
    Swap(Two.Item)
}

But I see what you mean given the example, that would be appropriate for 
SomeOperation(One.Item).




On Sunday, September 25, 2016 at 12:10:37 AM UTC-7, Tamás Gulácsi wrote:
>
> An interface is not a class, but the contract of minimal provided methods: 
> as Two has more methods, anything implements a two.Item will also implement 
> one.Item.

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