Builder.php

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<?php
namespace Magento\Framework\Acl;

class Builder
{
    protected $_acl;

    protected $_loaderPool;

    protected $_aclFactory;

    public function __construct(
        \Magento\Framework\AclFactory $aclFactory,
        \Magento\Framework\Acl\LoaderInterface $roleLoader,
        \Magento\Framework\Acl\LoaderInterface $resourceLoader,
        \Magento\Framework\Acl\LoaderInterface $ruleLoader
    ) {
        $this->_aclFactory = $aclFactory;
        $this->_loaderPool = [$roleLoader, $resourceLoader, $ruleLoader];
    }

    public function getAcl()
    {
        if ($this->_acl instanceof \Magento\Framework\Acl) {
            return $this->_acl;
        }

        try {
            $this->_acl = $this->_aclFactory->create();
            foreach ($this->_loaderPool as $loader) {
                $loader->populateAcl($this->_acl);
            }
        } catch (\Exception $e) {
            throw new \LogicException('Could not create an acl object: ' . $e->getMessage());
        }

        return $this->_acl;
    }

    public function resetRuntimeAcl()
    {
        $this->_acl = null;
        return $this;
    }
}