syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"polarity:"}]}
source_snippet:                         polarity: ty::PredicatePolarity::Positive,
context_before:                     bound_args_and_self_ty.map_bound(|(args, self_ty)| ty::TraitPredicate {
context_after:                         trait_ref: ty::TraitRef::new(