{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx|"}]}
        ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
            ecx.instantiate_normalizes_to_term(goal, upvars_ty.into());