{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
    /// See: <https://doc.rust-lang.org/nightly/std/marker/trait.CoerceUnsized.html>
    ///
    fn try_coerce_unsized(&mut self, from_ty: &Ty, to_ty: &Ty) -> CoerceResult {