syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"assert_eq!(predicates.parent,"}]}
source_snippet:         assert_eq!(predicates.parent, None);
context_before:         let predicates = tcx.predicates_of(def_id);
context_after:         let predicates = predicates.instantiate_own(tcx, args);