pausable-hook.sol

pragma solidity ^0.4.21;

contract PausableHook {
    modifier pausable() {
        _;
    }
}

contract Pausable is PausableHook {
    bool private paused;
    
    function pause() external {
        paused = true;
    }
    
    modifier pausable() {
        require(!paused);
        _;
    }
}

contract Foo is PausableHook {
    function foo() external pausable {
        
    }
}

contract PausableFoo is Foo, Pausable {
    
}