syntax_data: {"ast_node_type":"function","tokens":[{"end":43,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn universe(self) -> ty::UniverseIndex;
context_before: pub trait PlaceholderLike<I: Interner>: Copy + Debug + Hash + Eq {
context_after:     fn var(self) -> ty::BoundVar;