Executes an HTTP PATCH for the given URL using the specified HttpRequest object. The data used for the PATCH can be either included in the request object (as name-value parameters) or it can be added as a separate parameter (in the case of JSON, struct and so on). Requests can also be sent through a proxy.
Variable return type depends on the left hand side operator type.
The request parameter should have the HttpRequest type described here. The HttpProxy type is described here.