"Deprecated" isn't the proper term, I think. It's not in the mainline language, but it is instead kept as a separate module in the form of a parser transformati

"Deprecated" isn't the proper term, I think. It's not in the mainline language, but it is instead kept as a separate module in the form of a parser transformation, which CB pulls in during build time. In that regard, it's no different from pulling in any other library.