syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"assert_eq!(tcx.def_kind(trait_def_id),"}]}
source_snippet:     assert_eq!(tcx.def_kind(trait_def_id), DefKind::Trait);
context_before:     let trait_def_id = tcx.local_parent(fn_def_id);