Configuration类checkPath方法问题

com.alibaba.datax.common.util.Configuration类中的checkPath如下：
private void checkPath(final String path) {
if (null == path) {
throw new IllegalArgumentException(
"系统编程错误, 该异常代表系统编程错误, 请联系DataX开发团队!.");
}

for (final String each : StringUtils.split(".")) {
if (StringUtils.isBlank(each)) {
throw new IllegalArgumentException(String.format(
"系统编程错误, 路径[%s]不合法, 路径层次之间不能出现空白字符 .", path));
}
}
}
我有个疑问，其中for循环中的StringUtils.split(".")是不是不对，path没起到任何作用！

Locate the Configuration.checkPath method and inspect the loop containing StringUtils.split(".") alongside its path parameter. Determine the intended path validation behavior, then verify the fix with the relevant Configuration tests or a focused regression test covering valid and invalid paths.

Written by the indexing model from the issue text.