A2BHelperWithoutContextNamespace.HelperExtensionMethods.NameExtension C# (CSharp) Method

        public static string NameExtension()
        {
            //attribute helper
            return "Extension";
        }

            public override void DeclareSynchronization()
            {
                SynchronizeLeftToRightOnly(
                    s => s.NameA + HelperExtensionMethods.NameExtension(),
                    t => t.Name);

                SynchronizeManyLeftToRightOnly(SyncRule <RuleB>(),
                                               s => s.Elms,
                                               t => t.Elms);

                SynchronizeLeftToRightOnly(
                    s => HelperExtensionMethods.TestNameOfAElement("ABC", s),
                    t => t.IsNameABC);
            }