another test state machine

state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/enricher/matching/HeuristicEventMatchingEngine.java

@@ -116,9 +116,23 @@ public class HeuristicEventMatchingEngine implements EventMatchingEngine {
     }
 
     private boolean isWildcardVariable(String eventStr) {
-        return eventStr.equals("event") || eventStr.equals("e") || 
-               eventStr.equals("msg") || eventStr.equals("message") || 
-               eventStr.equals("payload");
+        if (eventStr == null) return false;
+        
+        if (eventStr.equals("event") || eventStr.equals("e") || 
+            eventStr.equals("msg") || eventStr.equals("message") || 
+            eventStr.equals("payload")) {
+            return true;
+        }
+        
+        if (eventStr.contains(".valueOf(") || eventStr.contains("valueOf (")) {
+            return true;
+        }
+
+        if (eventStr.contains(" ? ") && eventStr.contains(" : ")) {
+            return true;
+        }
+        
+        return false;
     }
 
     private String simplify(String name) {