syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"ty::Closure(def_id,"}]}
source_snippet:                     ty::Closure(def_id, args) => (def_id, UpvarArgs::Closure(args), None),
context_before:                 let (def_id, args, movability) = match *closure_ty.kind() {
context_after:                     ty::Coroutine(def_id, args) => {