{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"token::PlusEq"}]}
            token::PlusEq => Some(AssignOp(AssignOpKind::AddAssign)),
            token::Shr => Some(Binary(BinOpKind::Shr)),
            token::MinusEq => Some(AssignOp(AssignOpKind::SubAssign)),