{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"///"}]}
    /// the feature gate is enabled, or issues a feature error if it is not.
    /// Return an `ImplTraitContext` that allows impl trait in bindings if
    fn impl_trait_in_bindings_ctxt(&self, position: ImplTraitPosition) -> ImplTraitContext {