A coworker and I were discussing this very thing on Friday. He and I exhausted our Google-fu without success: Does anyone know of a framework/library that imp

A coworker and I were discussing this very thing on Friday. He and I exhausted our Google-fu without success: Does anyone know of a framework/library that implements this? Don’t really care about the language, but per other comments we’re interested in the practical lessons learned that would show up in code.