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Found nodes */
protected array $foundNodes;
public function __construct(callable $filterCallback) {
$this->filterCallback = $filterCallback;
}
/**
* Get found nodes satisfying the filter callback.
*
* Nodes are returned in pre-order.
*
* @return list Found nodes
*/
public function getFoundNodes(): array {
return $this->foundNodes;
}
public function beforeTraverse(array $nodes): ?array {
$this->foundNodes = [];
return null;
}
public function enterNode(Node $node) {
$filterCallback = $this->filterCallback;
if ($filterCallback($node)) {
$this->foundNodes[] = $node;
}
return null;
}
}