{"ast_node_type":"impl","tokens":[{"end":74,"kind":"keyword","start":0,"text":"///"}]}
    /// Allows `impl Trait` to be used inside associated types (RFC 2515).
    (unstable, if_let_guard, "1.47.0", Some(51114)),
    (unstable, impl_trait_in_assoc_type, "1.70.0", Some(63063)),