{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"///"}]}
    /// consumes (i.e. moves) the value, which would force the coroutine to `FnOnce`.
    /// Determines whether the body of the coroutine uses its upvars in a way that
    /// In a more detailed comment above, we care whether this happens, since if