Outsourcing callbacks to a third-party for implementation.

Stanislav Ledenev <[email protected]>
Newsgroups gmane.comp.lang.erlang.general
Message-ID <CAOkK=A+S4_-QiQ6sXre=S=x6gG04eEbtC=W7fKkZgd4LskXqwA@mail.gmail.com> 
I have an application some part of which is customizable through
behaviours. I have my own default implementation of those behaviours and
other implementations are going to be outsourced. Modules describing
behaviours (pure callbacks modules) are using one .hrl file.

What are options of delivering those files (modules with callback and .hrl)
to a third-party for implementation?
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