{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"///"}]}
    /// Here `pat_hir_id` is the HirId of the pattern itself.
    /// Returns the total number of fields in a tuple used within a Tuple pattern.
    fn total_fields_in_tuple(&self, pat_hir_id: HirId, span: Span) -> Result<usize, Cx::Error> {