changes in Initialse method as adding AddResource function

plugins/schemas/core/v1.1.0/Cancel.json

@@ -22,8 +22,25 @@
           ]
         }
       ]
+    },
+    "message": {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "order_id": {
+          "$ref": "definitions.json#/$defs/Order"
+        },
+        "cancellation_reason_id": {
+          "$ref": "definitions.json#/$defs/Option"
+        },
+        "descriptor": {
+          "$ref": "definitions.json#/$defs/Descriptor"
+        }
+      },
+      "required": [
+        "order_id"
+      ]
     }
-    
   },
   "required": [
     "message",