get_message? Really? Where'd that come from? I guess that's like examine_message. Are there any others, like (say) drop_message? Are these more efficient than verbose match statements? I imagine that they are.
I've answered the first part of my own question. I just made an intentional mistake in an object definition so that I could get an error and a tooltip with suggestions. Ignoring all the experimental ones, there's all sorts of interesting goodies in there, including those mentioned above, definite_article and indefinite_article. What are on_examine and traits? These look interesting.