text: public virtual GetCampaignVersionsResponse GetCampaignVersions(GetCampaignVersionsRequest request){var options = new InvokeOptions();options.RequestMarshaller = GetCampaignVersionsRequestMarshaller.Instance;options.ResponseUnmarshaller = GetCampaignVersionsResponseUnmarshaller.Instance;return Invoke<GetCampaignVersionsResponse>(request, options);}