contract Ownable {
    address  owner;

    function Ownable() public{
        owner = msg.sender;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner(){
        require(msg.sender == owner);
        _;
    }

    /**
     * @dev Allows the current owner to transfer control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function transferOwnership(address newOwner) onlyOwner public{
        assert(newOwner != address(0));
        owner = newOwner;
    }
}
function transferOwnership(address newOwner) onlyOwner public{
        assert(newOwner != address(0));
        owner = newOwner;
    }
/**
 * @dev Allows the current owner to transfer control of the contract to a newOwner.
 * @param newOwner The address to transfer ownership to.
 */