{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"///"}]}
    ///    parameters are returned in the `GenericArgsRef`
    /// 3. The `generic_args` contains info on the `<...>` contents. The `usize` type
    /// 4. Associated item constraints like `Output = u32` are contained in `generic_args.constraints`.