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    <h3>Editing: NodeConnectingVisitor.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php declare(strict_types=1);

namespace PhpParser\NodeVisitor;

use PhpParser\Node;
use PhpParser\NodeVisitorAbstract;

/**
 * Visitor that connects a child node to its parent node
 * as well as its sibling nodes.
 *
 * On the child node, the parent node can be accessed through
 * &lt;code&gt;$node-&gt;getAttribute('parent')&lt;/code&gt;, the previous
 * node can be accessed through &lt;code&gt;$node-&gt;getAttribute('previous')&lt;/code&gt;,
 * and the next node can be accessed through &lt;code&gt;$node-&gt;getAttribute('next')&lt;/code&gt;.
 */
final class NodeConnectingVisitor extends NodeVisitorAbstract {
    /**
     * @var Node[]
     */
    private array $stack = [];

    /**
     * @var ?Node
     */
    private $previous;

    public function beforeTraverse(array $nodes) {
        $this-&gt;stack    = [];
        $this-&gt;previous = null;
    }

    public function enterNode(Node $node) {
        if (!empty($this-&gt;stack)) {
            $node-&gt;setAttribute('parent', $this-&gt;stack[count($this-&gt;stack) - 1]);
        }

        if ($this-&gt;previous !== null &amp;&amp; $this-&gt;previous-&gt;getAttribute('parent') === $node-&gt;getAttribute('parent')) {
            $node-&gt;setAttribute('previous', $this-&gt;previous);
            $this-&gt;previous-&gt;setAttribute('next', $node);
        }

        $this-&gt;stack[] = $node;
    }

    public function leaveNode(Node $node) {
        $this-&gt;previous = $node;

        array_pop($this-&gt;stack);
    }
}
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