TreeBuilder.php

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<?php
namespace Magento\Framework\Acl\AclResource;

class TreeBuilder
{
    public function build(array $resourceList)
    {
        $result = [];
        foreach ($resourceList as $resource) {
            if ($resource['disabled']) {
                continue;
            }
            unset($resource['disabled']);
            $resource['children'] = $this->build($resource['children']);
            $result[] = $resource;
        }
        usort($result, [$this, '_sortTree']);
        return $result;
    }

    protected function _sortTree(array $nodeA, array $nodeB)
    {
        return $nodeA['sortOrder'] < $nodeB['sortOrder'] ? -1 : ($nodeA['sortOrder'] > $nodeB['sortOrder'] ? 1 : 0);
    }
}