syntax_data: {"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"trait_ref,"}]}
source_snippet:                 trait_ref,
context_before:             ty::PredicateKind::Clause(ty::ClauseKind::HostEffect(ty::HostEffectPredicate {
context_after:                 constness: _,