contract Governable {

    event Pause();
    event Unpause();

    address public governor;
    bool public paused = false;

    constructor() public {
        governor = msg.sender;
    }

    function setGovernor(address _gov) public onlyGovernor {
        governor = _gov;
    }

    modifier onlyGovernor {
        require(msg.sender == governor);
        _;
    }

    /**
    * @dev Modifier to make a function callable only when the contract is not paused.
    */
    modifier whenNotPaused() {
        require(!paused);
        _;
    }

    /**
    * @dev Modifier to make a function callable only when the contract is paused.
    */
    modifier whenPaused() {
        require(paused);
        _;
    }

    /**
    * @dev called by the owner to pause, triggers stopped state
    */
    function pause() onlyGovernor whenNotPaused public {
        paused = true;
        emit Pause();
    }

    /**
    * @dev called by the owner to unpause, returns to normal state
    */
    function unpause() onlyGovernor whenPaused public {
        paused = false;
        emit Unpause();
    }

}
function pause() onlyGovernor whenNotPaused public {
        paused = true;
        emit Pause();
    }
/**
 * @dev called by the owner to pause, triggers stopped state
 */