syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"hir::CoroutineSource::Closure,"}]}
source_snippet:                                 hir::CoroutineSource::Closure,
context_before:                                 _,
context_after:                             )) = self.tcx().coroutine_kind(def_id)