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Description
Is your feature request related to a problem? Please describe.
The current support for java/kotlin clients with the apache-httpclient is only for synchronous clients, this request is to add support for the async client as well.
Describe the solution you'd like
An additional set of templates that will support creating the client via HttpAsyncClients.custom() and each API method will return CompletableFuture to make the calls async.
Describe alternatives you've considered
Not possible to support async apache otherwise