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