How to use the node-emoji.random function in node-emoji

public QuickNew() {
        this.readConfig();

        let file: string = path.normalize(path.join(this.memodir, dateFns.format(new Date(), 'YYYY-MM-DD') + ".md"));
        let date: Date = new Date();
        let dateFormat = this.memoDateFormat;
        let getISOWeek = this.memoISOWeek == true ? "[Week: " + dateFns.getISOWeek(new Date()) + "/" + dateFns.getISOWeeksInYear(new Date()) + "] " : "";
        let getEmoji = this.memoEmoji == true ? randomEmoji.random().emoji : "";

        // console.log(getISOWeek);
        // console.log(getEmoji);

        fs.stat(file, async (err, files) => {
            if (err) {
                await fs.writeFile(file, "# " + dateFns.format(new Date(), `${dateFormat}`) + os.EOL + os.EOL, (err) => {
                    if (err) throw err;
                });
            }
        });

        // 選択されているテキストを取得
        // エディタが一つも無い場合は、エラーになるので対処しておく
        let editor = vscode.window.activeTextEditor;
        let selectString: String = editor ? editor.document.getText(editor.selection) : "";