public <T> FutureTask<T> execute(
            final ClassicHttpRequest request,
            final HttpContext context,
            final HttpClientResponseHandler<T> HttpClientResponseHandler) {
        return execute(request, context, HttpClientResponseHandler, null);
    }
Schedule a request for execution.

@param <T>

@param request
           request to execute
@param HttpClientResponseHandler
           handler that will process the response.
@return HttpAsyncClientFutureTask for the scheduled request.
httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/FutureRequestExecutionService.java