<?php $this->chgrp(new \FilesystemIterator($file), $group, true);
}
if (is_link($file) && \function_exists('lchgrp')) {
if (true !== @lchgrp($file, $group)) {
throw new IOException(sprintf('Failed to chgrp file "%s".', $file), 0, null, $file);
}
} else {
