{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"reason:"}]}
        reason: FutureIncompatibilityReason::EditionError(Edition::Edition2021),
    @future_incompatible = FutureIncompatibleInfo {
        reference: "<https://doc.rust-lang.org/edition-guide/rust-2021/prelude.html>",