{"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
                        let mutbl_cap = cmp::min(r_mutbl, pat_info.max_ref_mutbl.as_mutbl());
                        debug_assert!(self.downgrade_mut_inside_shared());
                        pat_info.binding_mode = pat_info.binding_mode.cap_ref_mutability(mutbl_cap);