(PHP 5 >= 5.3.0, PHP 7, PHP 8)
Permite recorrer un RecursiveIterator para generar un árbol gráfico ASCII.
$iterator
,$flags
= RecursiveTreeIterator::BYPASS_KEY,$cachingIteratorFlags
= CachingIterator::CATCH_GET_CHILD,$mode
= RecursiveTreeIterator::SELF_FIRST