/// <summary>
/// Retrieve an existing rule for a device/ruleId pair. If a rule does not exist
/// it will return null. This method is best used when you know the rule exists.
/// </summary>
/// <param name="deviceId"></param>
/// <param name="ruleId"></param>
/// <returns></returns>
public async Task <DeviceRule> GetDeviceRuleAsync(string deviceId, string ruleId)
{
return(await _deviceRulesRepository.GetDeviceRuleAsync(deviceId, ruleId));
}
