How to find list of `brms` options?

I know brms has a few options, such as brms.backend and brms.save_pars.

I was wondering both:

  1. Is there a way to set `sample_prior’ to “only” via options?
  2. More generally, how do I find the list of options that brms::brm() refers to? I did check the documentation, but it’s not necessarily direct about whether an option exists for particular arguments and how to refer to it…

Never mind, I forgot that one could just type brms::brm and see what happens to the arguments–whether it looks at the option or not, and what it’s called.