{"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"debug_assert!(self.prev()"}]}
        debug_assert!(self.prev() == 'r');
    fn raw_string_unvalidated(&mut self, prefix_len: u32) -> Result<u32, RawStrError> {
        let start_pos = self.pos_within_token();