public PipelineConfig addStageToPipeline(String pipelineName, StageConfig stageConfig) {
   CruiseConfig cruiseConfig = loadForEdit();
   PipelineConfig pipelineConfig =
       cruiseConfig.pipelineConfigByName(new CaseInsensitiveString(pipelineName));
   pipelineConfig.add(stageConfig);
   writeConfigFile(cruiseConfig);
   return pipelineConfig;
 }