syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"(def_id,"}]}
source_snippet:                         (def_id, UpvarArgs::Coroutine(args), Some(tcx.coroutine_movability(def_id)))
context_before:                     ty::Coroutine(def_id, args) => {
context_after:                     }