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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 diff(name, **kwargs):
    '''
    Gets the difference between the candidate and the current configuration.

    .. code-block:: yaml

            get the diff:
              junos:
                - diff
                - id: 10

    Parameters:
      Optional
        * id:
          The rollback id value [0-49]. (default = 0)
    '''
    ret = {'name': name, 'changes': {}, 'result': True, 'comment': ''}
    ret['changes'] = __salt__['junos.diff'](**kwargs)
    return ret