How to use the homematicip.aio.group.AsyncGroup function in homematicip

def get_and_check_entity_basics(
    hass, default_mock_hap, entity_id, entity_name, device_model
):
    """Get and test basic device."""
    ha_state = hass.states.get(entity_id)
    assert ha_state is not None
    if device_model:
        assert ha_state.attributes[ATTR_MODEL_TYPE] == device_model
    assert ha_state.name == entity_name

    hmip_device = default_mock_hap.hmip_device_by_entity_id.get(entity_id)

    if hmip_device:
        if isinstance(hmip_device, AsyncDevice):
            assert ha_state.attributes[ATTR_IS_GROUP] is False
        elif isinstance(hmip_device, AsyncGroup):
            assert ha_state.attributes[ATTR_IS_GROUP] is True
    return ha_state, hmip_device

def device_state_attributes(self) -> Dict[str, Any]:
        """Return the state attributes of the generic device."""
        state_attr = {}

        if isinstance(self._device, AsyncDevice):
            for attr, attr_key in DEVICE_ATTRIBUTES.items():
                attr_value = getattr(self._device, attr, None)
                if attr_value:
                    state_attr[attr_key] = attr_value

            state_attr[ATTR_IS_GROUP] = False

        if isinstance(self._device, AsyncGroup):
            for attr, attr_key in GROUP_ATTRIBUTES.items():
                attr_value = getattr(self._device, attr, None)
                if attr_value:
                    state_attr[attr_key] = attr_value

            state_attr[ATTR_IS_GROUP] = True

        return state_attr