syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// This method should be used when constructing a `Coroutine` out of a
context_before:     ///
context_after:     /// `CoroutineClosure`, when the `Coroutine`'s `kind` field is being populated