Implement toString for EmptyIcon

property-loader/src/main/java/com/github/weisj/darklaf/properties/icons/EmptyIcon.java

@@ -1,7 +1,7 @@
 /*
  * MIT License
  *
- * Copyright (c) 2019-2021 Jannis Weis
+ * Copyright (c) 2019-2023 Jannis Weis
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  * associated documentation files (the "Software"), to deal in the Software without restriction,
@@ -89,4 +89,12 @@ public final class EmptyIcon implements Icon, UIResource {
             return this.height == icon.height && this.width == icon.width;
         }
     }
+
+    @Override
+    public String toString() {
+        return "EmptyIcon{" +
+                "width=" + width +
+                ", height=" + height +
+                '}';
+    }
 }