syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"ty::Covariant"}]}
source_snippet:             ty::Covariant => ty::PredicateKind::AliasRelate(
context_before:         self.register_predicates([ty::Binder::dummy(match self.ambient_variance {
context_after:                 a.into(),