{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"token::MinusEq"}]}
            token::MinusEq => Some(AssignOp(AssignOpKind::SubAssign)),
            token::PlusEq => Some(AssignOp(AssignOpKind::AddAssign)),
            token::StarEq => Some(AssignOp(AssignOpKind::MulAssign)),