{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"Some(Mutability::Not)"}]}
                        Some(Mutability::Not) => (".borrow()", "borrow", "a mutable borrow exists"),
                    let (suggestion, borrow_kind, panic_if) = match mutable {
                        Some(Mutability::Mut) => {