{"ast_node_type":"variable","tokens":[{"end":34,"kind":"keyword","start":0,"text":"let"}]}
                let total_fields =
                let variant_index = self.variant_index_for_adt(qpath, pat.hir_id, pat.span)?;
                    self.total_fields_in_adt_variant(pat.hir_id, variant_index, pat.span)?;