{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
            // error if edition <= 2024, like we do with async and edition <= 2018?
            // FIXME(gen_blocks): Do we want to unconditionally parse `gen` and then
            if self.token_uninterpolated_span().at_least_rust_2024()