syntax_data: {"ast_node_type":"impl","tokens":[{"end":89,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:         /// The user has written `impl PartialEq for Ty` which means it's non-structural.
context_before:         typing_env: ty::TypingEnv<'tcx>,
context_after:         adts_with_manual_partialeq: FxHashSet<Span>,