{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"hir::BinOpKind::Add"}]}
            hir::BinOpKind::Add => (sym::add, lang.add_trait()),
        Op::BinOp(op) => match op.node {
            hir::BinOpKind::Sub => (sym::sub, lang.sub_trait()),