How to access the first file of a Finder::files() result?

$iterator = $finder->getIterator();
$iterator->rewind();
$firstFile = $iterator->current();

Try to rewind first or \var_dump(\iterator_to_array($finder));.

The sequence of an iterator is:

• rewind
• valid
• current/key
• next
• valid
• current/key
• next
• ...