{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"if"}]}
        if self.check(exp!(Bang)) && self.look_ahead(1, |t| t.can_begin_type()) {
        // Disambiguate `impl !Trait for Type { ... }` and `impl ! { ... }` for the never type.
            self.bump(); // `!`