{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"T![>>=]"}]}
                T![>>=] => BinaryOp::Assignment { op: Some(ArithOp::Shr) },
                T![<<=] => BinaryOp::Assignment { op: Some(ArithOp::Shl) },
                T![^=]  => BinaryOp::Assignment { op: Some(ArithOp::BitXor) },