BAEL-19 example of override

kotlin/src/main/kotlin/com/baeldung/Item.kt

@@ -1,6 +1,14 @@
 package com.baeldung
 
-open class Item(val id: String, val name: String = "unknown_name")
+open class Item(val id: String, val name: String = "unknown_name") {
+    open fun getIdOfItem(): String {
+        return id
+    }
+}
 
-class ItemWithCategory(id: String, name: String, val categoryId: String) : Item(id, name)
+class ItemWithCategory(id: String, name: String, val categoryId: String) : Item(id, name) {
+    override fun getIdOfItem(): String {
+        return id + name
+    }
+}