(PHP 5 >= 5.1.0, PHP 7, PHP 8)
NoRewindIterator::getInnerIterator — Get the inner iterator
Gets the inner iterator, that was passed in to NoRewindIterator.
本函数还未编写文档，仅有参数列表。
此函数没有参数。
The inner iterator, as passed to NoRewindIterator::__construct().