FixedPrice.sol#L10
LPDA.sol#L10
OpenEdition.sol#L10
transferOwnership function is used to change Ownership from OwnableUpgradeable.sol.
There is another Openzeppelin Ownable contract (Ownable2StepUpgradeable.sol) has  transferOwnership function,  use  is more secure due to 2-stage ownership transfer.
Ownable2StepUpgradeable.sol
