Comments
In Solidity, the unchecked keyword can be used to disable overflow and underflow checking for a particular operation or expression. This can improve the gas efficiency of the smart contract and simplify the code.
Instances
https://github.com/juniormp/audit-2023-04-rubicon/blob/511636d889742296a54392875a35e4c0c4727bb7/contracts/BathHouseV2.sol#L122