private static readonly Dictionary<DeclarationDocflowState, RegistrationPipelineState> declarationDocflowStateResolver = new Dictionary<DeclarationDocflowState, RegistrationPipelineState>
        {
            { DeclarationDocflowState.Unknown, RegistrationPipelineState.CreatedDeclaration },
            { DeclarationDocflowState.Sent, RegistrationPipelineState.SentDeclaration },
            { DeclarationDocflowState.HasFailedTransaction, RegistrationPipelineState.SentDeclaration },
            { DeclarationDocflowState.HasSuccessfulTransaction, RegistrationPipelineState.SentDeclaration },
            { DeclarationDocflowState.Successful, RegistrationPipelineState.AcceptedDeclaration },
            { DeclarationDocflowState.Failed, RegistrationPipelineState.RejectedDeclaration }
        };

        private static readonly Dictionary<DeclarationDemandDocflowState, RegistrationPipelineState> declarationDemandDocflowStateResolver = new Dictionary<DeclarationDemandDocflowState, RegistrationPipelineState>
        {
            { DeclarationDemandDocflowState.Unknown, RegistrationPipelineState.SentDeclaration },
            { DeclarationDemandDocflowState.AcceptedDeclaration, RegistrationPipelineState.AcceptedDeclarationDemand },
            { DeclarationDemandDocflowState.RejectedDeclaration, RegistrationPipelineState.RejectedDeclarationDemand }
        };

        private static readonly Dictionary<ReportDocflowState, RegistrationPipelineState> reportDocflowStateResolver = new Dictionary<ReportDocflowState, RegistrationPipelineState>
        {
            { ReportDocflowState.Unknown, RegistrationPipelineState.ReportCreated },
            { ReportDocflowState.Sent, RegistrationPipelineState.ReportSent },
            { ReportDocflowState.HasFailedTransaction, RegistrationPipelineState.SentDeclaration },
            { ReportDocflowState.HasSuccessfulTransaction, RegistrationPipelineState.SentDeclaration },
            { ReportDocflowState.Successful, RegistrationPipelineState.ReportAccepted },
            { ReportDocflowState.Failed, RegistrationPipelineState.ReportRejected }
        };

        private static TValue SafeGet<TKey,TValue>(TKey key, Dictionary<TKey, TValue> source)
            => source.ContainsKey(key)? source[key] : throw new ArgumentOutOfRangeException();

        private static RegistrationPipelineState GetFirstStageState(DeclarationDocflowState declarationDocflowState)
            => SafeGet(declarationDocflowState, declarationDocflowStateResolver);

        private static RegistrationPipelineState GetSecondStageState(DeclarationDemandDocflowState declarationDemandDocflowState)
            => SafeGet(declarationDemandDocflowState, declarationDemandDocflowStateResolver);

        private static RegistrationPipelineState GetThirdStageState(ReportDocflowState reportDocflowState)
            => SafeGet(reportDocflowState, reportDocflowStateResolver);


        private static RegistrationPipelineState GetState(
            DeclarationDocflowState declarationDocflowState,
            DeclarationDemandDocflowState declarationDemandDocflowState,
            ReportDocflowState reportDocflowState)
        {
            try
            {
                var lastStage = GetFirstStageState(declarationDocflowState);
                if (lastStage != RegistrationPipelineState.AcceptedDeclaration)
                {
                    lastStage = GetSecondStageState(declarationDemandDocflowState);
                    if (lastStage != RegistrationPipelineState.AcceptedDeclarationDemand)
                    {
                        lastStage = GetThirdStageState(reportDocflowState);
                        if (lastStage != RegistrationPipelineState.ReportAccepted)
                        {
                            //lastStage = GetForthState(reportDemandDocflowState);
                        }
                    }
                }
                return lastStage;
            }
            catch (ArgumentOutOfRangeException e)
            {
                throw new IllegalProgramException("Unknown RegistrationPipelineState")
                    .AddData("DeclarationDocflowState", declarationDocflowState)
                    .AddData("DeclarationDemandDocflowState", declarationDemandDocflowState)
                    .AddData("ReportDocflowState", reportDocflowState)
                    .AddData("Exception", e);
            }
        }