How to get the content of the string being replaced with deface library, before the replacement

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I want replace in *.erb files tag using spree/deface library in rails. Replacing work fine. But I want get override string before it will override and get attribute "name" for example. I want use some attribute from old string in new string. For example: i want replace <img class="deface" name="anyname" src="#"> on <h1>anyname</h1> "anyname" - different for every tag.

I dont find this feature in documentation. I try search something in library code, but my skill in ruby is not high. I try use <%= render_original %> placeholder for :surround action, but it not contain surrounding string. Maybe i am wrong.

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