* @param body the plugin installation data containing name and version
     * @return JSON response indicating success or failure
     */
    // POST /api/admin/plugin
    @Execute
    public JsonResponse<ApiResult> post$index(final InstallBody body) {
        validateApi(body, messages -> {});
        final Artifact artifact = ComponentUtil.getPluginHelper().getArtifact(body.name, body.version);
        if (artifact == null) {

            try (CurlResponse response = ComponentUtil.getCurlHelper()
                    .post("/" + index + "/_update_by_query")
                    .param("refresh", refresh)
                    .param("max_docs", "1")
                    .body(source)
                    .execute()) {