    function doTransferOut(address payable to, uint amount) virtual override internal {
        require(address(_accountant) != address(0));
        EIP20Interface token = EIP20Interface(underlying);
        if (to != address(_accountant)) {
            uint err = _accountant.supplyMarket(amount);
            if (err != 0) { revert AccountantRedeemError(amount); }
        }   
        token.transfer(to, amount);
        bool success;
        assembly {
            switch returndatasize()
                case 0 { success := not(0) }
                case 32 { 
                    returndatacopy(0, 0, 32)
                    success := mload(0)
                }
                default { revert(0, 0) }
        } 
        require(success, "TOKEN_TRANSFER_OUT_FAILED");
        require(token.balanceOf(address(this)) == 0, "cNote::doTransferOut: TransferOut Failed"); // <-- ERROR
    }
