Public `build_twin` method

[faucct]

Hello, this method is useful when constructing a default record for button at has_many form, because it does not append the record to base form collection. When constructing a nested twin using any other method I am losing parent property value from Disposable::Twin::Parent. Can you make it public, please?
Hope I have explained the thing I am trying to deal with good enough. I can bring more explanation if not. Thanks.

[faucct]

I think that it could be exposed via Twinner#call via Collection#build or some other name than build. Do you mind me implementing this piece?

[apotonick]

I checked the AA code but couldn't see how this will be used. Could you be so kind and give me some brief insights how you'd like to have the public API in pseudo code and how you're planning to use it?