{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"///"}]}
    /// implement `Coroutine<R, Yield = Y, Return = O>`, given the resume, yield,
    /// A coroutine (that doesn't come from an `async` or `gen` desugaring) is known to
    /// and return types of the coroutine computed during type-checking.