public BulkResponse updateWorkflowDef(List<WorkflowDef> workflowDefList) {
        BulkResponse bulkResponse = new BulkResponse();
        for (WorkflowDef workflowDef : workflowDefList) {
            try {
                updateWorkflowDef(workflowDef);
                bulkResponse.appendSuccessResponse(workflowDef.getName());
            } catch (Exception e) {
                LOGGER.error("bulk update workflow def failed, name {} ", workflowDef.getName(), e);
                bulkResponse.appendFailedResponse(workflowDef.getName(), e.getMessage());
            }
        }
        return bulkResponse;
    }
@param workflowDefList Workflow definitions to be updated.
core/src/main/java/com/netflix/conductor/service/MetadataServiceImpl.java