{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"token::ShrEq"}]}
            token::ShrEq => Some(AssignOp(AssignOpKind::ShrAssign)),
            token::ShlEq => Some(AssignOp(AssignOpKind::ShlAssign)),
            token::Lt => Some(Binary(BinOpKind::Lt)),