docs: @BetaApi
    public final Operation patchAutoscaler(
        String autoscaler,
        ProjectZoneName zone,
        Autoscaler autoscalerResource,
        List<String> fieldMask) {
  
      PatchAutoscalerHttpRequest request =
          PatchAutoscalerHttpRequest.newBuilder()
              .setAutoscaler(autoscaler)
              .setZone(zone == null ? null : zone.toString())
              .setAutoscalerResource(autoscalerResource)
              .addAllFieldMask(fieldMask)
              .build();
      return patchAutoscaler(request);
    }