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<?php declare(strict_types=1);
namespace PhpParser;
use PhpParser\NodeVisitor\FindingVisitor;
use PhpParser\NodeVisitor\FirstFindingVisitor;
class NodeFinder
{
    /**
     * Find all nodes satisfying a filter callback.
     *
     * @param Node|Node[] $nodes  Single node or array of nodes to search in
     * @param callable    $filter Filter callback: function(Node $node) : bool
     *
     * @return Node[] Found nodes satisfying the filter callback
     */
    public function find($nodes, callable $filter) : array {
        if (!is_array($nodes)) {
            $nodes = [$nodes];
        }
        $visitor = new FindingVisitor($filter);
        $traverser = new NodeTraverser;
        $traverser->addVisitor($visitor);
        $traverser->traverse($nodes);
        return $visitor->getFoundNodes();
    }
    /**
     * Find all nodes that are instances of a certain class.
     *
     * @param Node|Node[] $nodes Single node or array of nodes to search in
     * @param string      $class Class name
     *
     * @return Node[] Found nodes (all instances of $class)
     */
    public function findInstanceOf($nodes, string $class) : array {
        return $this->find($nodes, function ($node) use ($class) {
            return $node instanceof $class;
        });
    }
 
 
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