code: public ManifestVersionsEnvelope getAvailableManifestVersions(String deviceTypeId) throws ApiException {
          ApiResponse<ManifestVersionsEnvelope> resp = getAvailableManifestVersionsWithHttpInfo(deviceTypeId);
          return resp.getData();
      }
docs: Get Available Manifest Versions
  Get a Device Type&#39;s available manifest versions
  @param deviceTypeId deviceTypeId (required)
  @return ManifestVersionsEnvelope
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body