message: Fixed ActionRule's polymorphism via discriminator
diff: "$ref": "#/definitions/ActionRuleProperties"
  },
  {
  - "type": "object"
  - }
  - ],
  + "type": "object",
  "properties": {
  "suppressionConfig": {
  "description": "suppression configuration for the action rule",
  "$ref": "#/definitions/SuppressionConfig"
  }
  }
  + }
  + ]
  },
  "ActionGroup": {
  "title": "Action Group based Action Rule",
  "$ref": "#/definitions/ActionRuleProperties"
  },
  {
  - "type": "object"
  - }
  - ],
  + "type": "object",
  "properties": {
  "actionGroupId": {
  "type": "string",
  "description": "Action group to trigger if action rule matches"
  }
  }
  + }
  + ]
  },
  "Diagnostics": {
  "title": "Diagnostics based Action Rule",
  