{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"(accepted,"}]}
    (accepted, expr_fragment_specifier_2024, "1.83.0", Some(123742)),
    /// Uses 2024 rules for matching `expr` fragments in macros. Also enables `expr_2021` fragment.
    /// Allows arbitrary expressions in key-value attributes at parse time.