{"ast_node_type":"struct","tokens":[{"end":99,"kind":"keyword","start":0,"text":"///"}]}
    /// Allows const generics to have default values (e.g. `struct Foo<const N: usize = 3>(...);`).
    (accepted, const_fn_unsize, "1.54.0", Some(64992)),
    (accepted, const_generics_defaults, "1.59.0", Some(44580)),