public async Task <IInstance> Load(Guid instanceId)
        {
            var prms = new ExpandoObject()
            {
                { "Id", instanceId }
            };

            var eo = await _dbContext.ReadExpandoAsync(null, $"{Definitions.SqlSchema}.[Instance.Load]", prms);

            if (eo == null)
            {
                throw new SqlServerStorageException($"Instance '{instanceId}' not found");
            }

            var identity = new Identity()
            {
                Id      = eo.Get <String>("WorkflowId"),
                Version = eo.Get <Int32>("Version")
            };

            return(new Instance()
            {
                Id = instanceId,
                Parent = eo.Get <Guid>("Parent"),
                Workflow = await _workflowStorage.LoadAsync(identity),
                State = _serializer.Deserialize(eo.Get <String>("State")),
                ExecutionStatus = Enum.Parse <WorkflowExecutionStatus>(eo.Get <String>("ExecutionStatus")),
                Lock = eo.Get <Guid>("Lock")
            });
        }
        public async ValueTask <IInstance> CreateAsync(IIdentity identity)
        {
            var wf = await _workflowStorage.LoadAsync(identity);

            return(await CreateAsync(wf.Root, wf.Identity));
        }