syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:         /// but we don't have a span to point at, so we'll just add them as a `note`.
context_before:         /// The user has written `impl PartialEq for Ty` which means it's non-structural,
context_after:         manual: FxHashSet<Ty<'tcx>>,