public static async Task <BusinessUnit> GetOrCreateBusinessUnitAsync(this MasterSideLetterDataAccess dataAccess, string name)
        {
            var existing = await dataAccess.GetBusinessUnitByNameAsync(name);

            if (existing != null)
            {
                return(existing);
            }
            var newBusinessUnit = new BusinessUnit {
                Name = name
            };

            newBusinessUnit.Id = await dataAccess.CreateBusinessUnitAsync(newBusinessUnit);

            return(newBusinessUnit);
        }