Options.php

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<?php
namespace Magento\AdvancedSearch\Model\Adminhtml\Search\Grid;

class Options implements \Magento\Framework\Option\ArrayInterface
{
    protected $_request;

    protected $_registryManager;

    protected $_searchResourceModel;

    public function __construct(
        \Magento\Framework\App\RequestInterface $request,
        \Magento\Framework\Registry $registry,
        \Magento\AdvancedSearch\Model\ResourceModel\Recommendations $searchResourceModel
    ) {
        $this->_request = $request;
        $this->_registryManager = $registry;
        $this->_searchResourceModel = $searchResourceModel;
    }

    public function toOptionArray()
    {
        $queries = $this->_request->getPost('selected_queries');

        $currentQueryId = $this->_registryManager->registry('current_catalog_search')->getId();
        $queryIds = [];
        if ($queries === null && !empty($currentQueryId)) {
            $queryIds = $this->_searchResourceModel->getRelatedQueries($currentQueryId);
        }
        return $queryIds;
    }
}