Best Way to mock or stub an integration ( How to set httpResponse object on a dictionary on the fly) inside an expression rule

Hi,

       I am trying to stub / mock an api response for an http Integration in a expression rule . Basically I am trying to a create a dictionary like what we get on a successful response from an api like below structure

Dictionary

• success  -   true(Boolean)
• result   -    HttpResponse

I am able to get first key (success - true) using a!fromJson , but cant find a way to set a successful HttpResponse object to result key through  the code . I tried to use a!httpResponse , but it creates a webapiResponse .

I can see an IntegrationError Object to create such an object for error scenarios. But why there is no IntegrationSuccess object similar to this ?

a!fromJson(
  "{""success"":true}"
)