docs: @BetaApi
    public final Operation setInstanceTemplateRegionInstanceGroupManager(
        String instanceGroupManager,
        RegionInstanceGroupManagersSetTemplateRequest
            regionInstanceGroupManagersSetTemplateRequestResource) {
  
      SetInstanceTemplateRegionInstanceGroupManagerHttpRequest request =
          SetInstanceTemplateRegionInstanceGroupManagerHttpRequest.newBuilder()
              .setInstanceGroupManager(instanceGroupManager)
              .setRegionInstanceGroupManagersSetTemplateRequestResource(
                  regionInstanceGroupManagersSetTemplateRequestResource)
              .build();
      return setInstanceTemplateRegionInstanceGroupManager(request);
    }