public async Task <IEnumerable <CheckPointDto> > GetCheckPointsofParentTask(int parentTaskId)
{
if (!await taskRepository.isTaskExist(parentTaskId))
{
throw new Exception("task not exist");
}
var Checkpoints = await checkpointRepository.GetAllCheckpointsByParentTaskId(parentTaskId);
return(Checkpoints.Select(c => mapper.Map <CheckPointDto>(c)).ToList());
}
