The documentation says that this is only used for heuristics, but it
is never actually called. This should be removed for now and perhaps
added back later if we find an actual use for it.
From feedback from @julian-seward1. I had used "list" in a more generic
sense, meaning ordered sequence of elements, while in a Rust context it
can sometimes be confused with "linked list" specifically. These
alternative terms are more precise.
