Make By Reference Paramters like InStream or JsonOjbect explict by adding var to procedures

[pri-kise]

I would like to discuss about adding var on paramters, that are implicit by reference to make this clear to any developer, that they are working on the same instance of an variable.

Bad Practice

    procedure GetFile(AccountId: Guid; Path: Text; Stream: InStream);

Good Practice:

    procedure GetFile(AccountId: Guid; Path: Text; var Stream: InStream);

The same applies for all new types, like HttpClient, JsonObject (JsonXXX), XmlDocument (XmlXXX).