Extended.php

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<?php
namespace Magento\Backend\Block\Widget\Grid\Column\Renderer\Options;

class Extended extends \Magento\Backend\Block\Widget\Grid\Column\Renderer\Options
{
    protected $_converter;

    public function __construct(
        \Magento\Backend\Block\Context $context,
        \Magento\Backend\Block\Widget\Grid\Column\Renderer\Options\Converter $converter,
        array $data = []
    ) {
        parent::__construct($context, $data);
        $this->_converter = $converter;
    }

    public function _getOptions()
    {
        $options = $this->getColumn()->getOptions();
        return $this->_converter->toTreeArray($options);
    }
}