/// <summary>
 /// Does deep-equality testing on two collections, ignoring complex item referencing
 /// Hint: if the collections are of disparate type, try using
 /// `Expect(left).As.Objects.To.Intersection.Equal(right)`
 /// </summary>
 /// <param name="continuation">Continuation to operate on</param>
 /// <param name="expected">Collection to match</param>
 /// <typeparam name="T">Collection item type</typeparam>
 public static void Equal <T>(
     this ICollectionDeep <T> continuation,
     IEnumerable <T> expected
     )
 {
     continuation.Equal(expected, NULL_STRING);
 }
 /// <summary>
 /// Does deep-equality testing on two collections, ignoring complex item referencing
 /// Hint: if the collections are of disparate type, try using
 /// `Expect(left).As.Objects.To.Intersection.Equal(right)`
 /// </summary>
 /// <param name="continuation">Continuation to operate on</param>
 /// <param name="expected">Collection to match</param>
 /// <param name="customMessage">Custom message to add when failing</param>
 /// <typeparam name="T">Collection item type</typeparam>
 public static void Equal <T>(
     this ICollectionDeep <T> continuation,
     IEnumerable <T> expected,
     string customMessage
     )
 {
     continuation.Equal(expected, () => customMessage);
 }
 /// <summary>
 /// Does deep-equality testing on two collections, ignoring complex item referencing
 /// Hint: if the collections are of disparate type, try using
 /// `Expect(left).As.Objects.To.Intersection.Equal(right)`
 /// </summary>
 /// <param name="continuation">Continuation to operate on</param>
 /// <param name="expected">Collection to match</param>
 /// <param name="customMessageGenerator">Generates a custom message to add when failing</param>
 /// <typeparam name="T">Collection item type</typeparam>
 public static void Equal <T>(
     this ICollectionDeep <T> continuation,
     IEnumerable <T> expected,
     Func <string> customMessageGenerator
     )
 {
     continuation.AddMatcher(
         MakeCollectionDeepEqualMatcherFor(expected, customMessageGenerator)
         );
 }