public void updateWorkflowDefs(List<WorkflowDef> workflowDefs) {
        Validate.notNull(workflowDefs, "Workflow defs list cannot be null");
        put("metadata/workflow", null, workflowDefs);
    }
Updates a list of existing workflow definitions

@param workflowDefs List of workflow definitions to be updated
client/src/main/java/com/netflix/conductor/client/http/MetadataClient.java