{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"@future_incompatible"}]}
    @future_incompatible = FutureIncompatibleInfo {
    To keep the existing behavior, use the `expr_2021` fragment specifier.",
        reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2024),