{"ast_node_type":"variable","tokens":[{"end":92,"kind":"keyword","start":0,"text":"//"}]}
            // However, this is not exactly right. When `let _ = a` is the LHS of a binop we
            // Here `let pats = expr` has `let pats =` as a "unary" prefix of `expr`.
            // need parens sometimes. E.g. we can print `(let _ = a) && b` as `let _ = a && b`