public static AboutForm getInstance() {
        if (aboutForm == null) {
            aboutForm = new AboutForm();
        }
        return aboutForm;
    }
<pre>
AboutForm
</pre>

@author <a href="https://github.com/rememberber">RememBerBer</a>
@since 2019/5/6.
src/main/java/com/fangxuele/tool/push/ui/form/AboutForm.java