compiler plugin for fields

[nbronson]

TxnFieldUpdater leads to some boilerplate, which should be automated with a compiler plugin that processes a per-field annotation. The resulting fields would get transactional getters and setters, and also a getter that would produce a Ref instance for non-transactional access and more sophisticated operations.

[nbronson]

Given a compiler plugin, is targeting TxnFieldUpdater actually the best strategy?