(PHP 5 >= 5.3.0, PHP 7, PHP 8)
RecursiveTreeIterator::setPrefixPart — Set a part of the prefix
public RecursiveTreeIterator::setPrefixPart(int $part, string $value): void
Sets a part of the prefix used in the graphic tree.
This function is currently not documented; only its argument list is available.
partOne of the RecursiveTreeIterator::PREFIX_* constants.
value The value to assign to the part of the prefix specified in part.
No value is returned.
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https://www.php.net/manual/en/recursivetreeiterator.setprefixpart.php