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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def mod_watch(name, sfun=None, **kwargs):
    '''
    The docker_container watcher, called to invoke the watch command.

    .. note::
        This state exists to support special handling of the ``watch``
        :ref:`requisite <requisites>`. It should not be called directly.

        Parameters for this function should be set by the state being triggered.
    '''
    if sfun == 'running':
        watch_kwargs = copy.deepcopy(kwargs)
        if watch_kwargs.get('watch_action', 'force') == 'force':
            watch_kwargs['force'] = True
        else:
            watch_kwargs['send_signal'] = True
            watch_kwargs['force'] = False
        return running(name, **watch_kwargs)

    if sfun == 'stopped':
        return stopped(name, **salt.utils.args.clean_kwargs(**kwargs))

    if sfun == 'run':
        return run(name, **salt.utils.args.clean_kwargs(**kwargs))

    return {'name': name,
            'changes': {},
            'result': False,
            'comment': ('watch requisite is not'
                        ' implemented for {0}'.format(sfun))}