Constructor
(protected) new DirectQueryingClient(endpointnon-null, actorRequestFactorynon-null)
    An internal `DirectQueryingClient` constructor.
Use `FirebaseClient#usingFirebase()` for instantiation.
    Parameters:
| Name | Type | Description | 
|---|---|---|
endpoint | 
            
            HttpEndpoint | the server endpoint to execute queries and commands | 
actorRequestFactory | 
            
            ActorRequestFactory | a factory to instantiate the actor requests with | 
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