external / public functions parameters should be validated to make sure the address is not 0.
Otherwise if not given the right input it can mistakenly lead to loss of user funds.


    OpenLevV1Lib.sol.doTransferOut weth
    OpenLevV1Lib.sol.doTransferOut to
    FarmingPools.sol.notifyRewardAmount stakeToken
    ControllerDelegator.sol.constructor _xoleToken
    EthDexAggregatorV1.sol.getAvgPrice desToken
    LPool.sol.reduceReserves to
    OpenLevV1.sol.doTransferOut to
    XOLE.sol._moveDelegates dstRep
    EthDexAggregatorV1.sol.updatePriceOracle quoteToken
    UniV3Dex.sol.uniV3Buy sellToken
    LPool.sol.repayBorrowEndByOpenLev borrower
    LPool.sol.borrowBalanceStored account
    UniV3Dex.sol.increaseV3Observation quoteToken
    OpenLevDelegator.sol.constructor _dexAggregator
    LPool.sol.borrowBalanceStoredInternal account
    ControllerDelegator.sol.constructor _wETH