{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"//"}]}
        // In order to get good UX, we first recover in the case of a leading vert for an illegal
    pub(super) fn parse_fn_param_pat_colon(&mut self) -> PResult<'a, (P<Pat>, bool)> {
        // top-level or-pat. Normally, this means recovering both `|` and `||`, but in this case,