syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"ty::Dynamic(trait_ty,"}]}
source_snippet:             ty::Dynamic(trait_ty, reg, _) => {
context_before:             ty::Adt(_, args) => args.visit_with(visitor),
context_after:                 try_visit!(trait_ty.visit_with(visitor));