'Get a config options for a domain.
:param domain_id: the domain for this option
:param group: optional group option name
:param option: optional option name. If group is None, then this
parameter is ignored
:param sensitive: whether the option is sensitive
:returns: list of dicts containing group, option and value'

@abc.abstractmethod
def list_config_options(self, domain_id, group=None, option=False, sensitive=False):

    raise exception.NotImplemented()
