Links.php

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<?php
namespace Magento\Framework\View\Element\Html;

class Links extends \Magento\Framework\View\Element\Template
{
    public function getLinks()
    {
        return $this->_layout->getChildBlocks($this->getNameInLayout());
    }

    protected function getLinkByPath($path)
    {
        foreach ($this->getLinks() as $link) {
            if ($link->getPath() == $path) {
                return $link;
            }
        }
    }

    public function setActive($path)
    {
        $link = $this->getLinkByPath($path);
        if ($link) {
            $link->setIsHighlighted(true);
        }
    }

    public function renderLink(\Magento\Framework\View\Element\AbstractBlock $link)
    {
        return $this->_layout->renderElement($link->getNameInLayout());
    }

    protected function _toHtml()
    {
        if (false != $this->getTemplate()) {
            return parent::_toHtml();
        }

        $html = '';
        if ($this->getLinks()) {
            $html = '<ul' . ($this->hasCssClass() ? ' class="' . $this->escapeHtml(
                $this->getCssClass()
            ) . '"' : '') . '>';
            foreach ($this->getLinks() as $link) {
                $html .= $this->renderLink($link);
            }
            $html .= '</ul>';
        }

        return $html;
    }
}