syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"|"}]}
source_snippet:         | ty::Coroutine(def_id, _)
context_before:         | ty::CoroutineClosure(def_id, _)
context_after:         | ty::CoroutineWitness(def_id, _)