ContactGroupRegistrationInitialization.cs

[InitializableModule]
[ModuleDependency(typeof(CommerceInitialization))]
public class ContactGroupRegistrationInitialization : IInitializableModule
{
    public void Initialize(InitializationEngine context)
    {
        var metaFieldType = DataContext.Current.MetaModel.RegisteredTypes["ContactGroup"];

        MetaEnumItem[] existingItems = MetaEnum.GetItems(metaFieldType);

        if(!existingItems.Any(c => c.Handle.Equals(4)))
            MetaEnum.AddItem(metaFieldType, 4, "Premium", 4);
    }

    public void Uninitialize(InitializationEngine context)
    {
    }
}