I have **created the block** file which **extends** **\Magento\Config\Block\System\Config\Form\Field\FieldArray\AbstractFieldArray** **from Module-Config. Now I need to get Protected property from the above core file. Please provide me a solution**

\Magento\Config\Block\System\Config\Form\Field\FieldArray\AbstractFieldArray

   

     public function addColumn($name, $params)
            {
                $this->_columns[$name] = [
                    'label' => $this->_getParam($params, 'label', 'Column'),
                    'size' => $this->_getParam($params, 'size', false),
                    'style' => $this->_getParam($params, 'style'),
                    'class' => $this->_getParam($params, 'class'),
                    'renderer' => false,
                ];
                if (!empty($params['renderer']) && $params['renderer'] instanceof \Magento\Framework\View\Element\AbstractBlock) {
                    $this->_columns[$name]['renderer'] = $params['renderer'];
                }
            }

I need to get "_columns" to my custom template
System.xml

    <field id="fieldslide" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                        <label>Small image</label>
                        <frontend_model>X\Y\Block\Adminhtml\System\Config</frontend_model>
                        <backend_model>Magento\Config\Model\Config\Backend\Serialized\ArraySerialized</backend_model>                    
                        <comment>Image size should be in Bytes(1 KB = 1024 Bytes, 10 KB = 10240 Bytes, 50 KB = 51200 Bytes, 100 KB = 102400 Bytes, 150 KB = 153600 Bytes)</comment>
                    </field>