{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"(accepted,"}]}
    (accepted, irrefutable_let_patterns, "1.33.0", Some(44495)),
    /// Allows irrefutable patterns in `if let` and `while let` statements (RFC 2086).
    /// Allows `#[instruction_set(_)]` attribute.