Update existing workflow example

POOrderEntry_Workflow_SSCS.cs

using PX.Data;
using PX.Data.WorkflowAPI;
using SSCS;

namespace PX.Objects.PO
{
    using State = POOrderStatus;
    using static PX.Data.WorkflowAPI.BoundedTo<POOrderEntry, POOrder>;
    using static POOrder;
    public class POOrderEntry_Workflow_SSCS : PXGraphExtension<POOrderEntry>
    {
        public static bool IsActive() =>
            SSCSAccess.FeatureInstalled<SSCSFeaturesSet.main>();

        public override void Configure(PXScreenConfiguration config) => Configure(config.GetScreenConfigurationContext<POOrderEntry, POOrder>());

        protected virtual void Configure(WorkflowContext<POOrderEntry, POOrder> context)
        {
            if (IsActive() == true)
            {
                context.UpdateScreenConfigurationFor(screen =>
                {
                    screen.StateIdentifierIs<status>()
                        .WithFlows(flow => flow
                            .Update<POOrderType.regularOrder>(flowRO => flowRO
                                .WithFlowStates(states =>
                                {
                                    states.Update<State.pendingPrint>(flowState => flowState
                                        .WithFieldStates(fields =>
                                        {
                                            fields.AddField<POOrderExt.usrSSConfirmationRequired>();
                                            fields.AddField<POOrderExt.usrSSConfirmed>();
                                        }));
                                    states.Update<State.pendingEmail>(flowState => flowState
                                        .WithFieldStates(fields =>
                                        {
                                            fields.AddField<POOrderExt.usrSSConfirmationRequired>();
                                            fields.AddField<POOrderExt.usrSSConfirmed>();
                                        }));
                                    states.Update<State.open>(flowState => flowState
                                        .WithFieldStates(fields =>
                                        {
                                            fields.AddField<POOrderExt.usrSSConfirmationRequired>();
                                            fields.AddField<POOrderExt.usrSSConfirmed>();
                                        }));
                                })
                            ));

                    return screen;
                });
            }
        }

    }
}