{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
            // Check that the type implements all of the predicates of the trait object.
        self.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
            // (i.e. the principal, all of the associated types match, and any auto traits)