/// <summary>
 /// Used to test exception messages
 /// </summary>
 /// <param name="src">Continuation containing exception message to test</param>
 /// <param name="test">Custom function to test the message -- return true if the test should pass</param>
 /// <param name="customMessage">Custom message to add to failure messages</param>
 /// <returns>Another continuation so you can do .And()</returns>
 public static IStringPropertyContinuation Matching(
     this IExceptionPropertyContinuation <string> src,
     Func <string, bool> test,
     string customMessage)
 {
     return(src.Matching(test, () => customMessage));
 }
 /// <summary>
 /// Used to test exception messages
 /// </summary>
 /// <param name="src">Continuation containing exception message to test</param>
 /// <param name="test">Custom function to test the message -- return true if the test should pass</param>
 /// <returns>Another continuation so you can do .And()</returns>
 public static IStringPropertyContinuation Matching(
     this IExceptionPropertyContinuation <string> src,
     Func <string, bool> test
     )
 {
     return(src.Matching(test, NULL_STRING));
 }