{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"token::Shr"}]}
            token::Shr => Some(Binary(BinOpKind::Shr)),
            token::Shl => Some(Binary(BinOpKind::Shl)),
            token::PlusEq => Some(AssignOp(AssignOpKind::AddAssign)),