syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"UpvarArgs::Coroutine(args)"}]}
source_snippet:                     UpvarArgs::Coroutine(args) => {
context_before:                 let result = match args {
context_after:                         Box::new(AggregateKind::Coroutine(closure_id.to_def_id(), args))