void rulesAnalyzer_pauseMistakeEvent(object sender, Mistake x)
 {
     textFeedback.CurrentFeedback.Content = x.getString();
 }
 void rulesAnalyzer_feedBackEvent(object sender, Mistake x)
 {
     if (x.hasEnded)
     {
         textFeedback.CurrentFeedback.Content = ":-D";
     }
     else
     {
         textFeedback.CurrentFeedback.Content = x.getString();
     }
 }