{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//"}]}
                // an `UnOp::Neg` and an `ExprKind::Lit`, like how
                // `e` is an `ExprKind::Lit` or an `ExprKind::Unary` containing
                // `can_begin_literal_maybe_minus` works. But this method has