staempfli/magento2-module-widget-extra-fields

<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
 * di
 *
 * @copyright Copyright © 2017 Staempfli AG. All rights reserved.
 * @author    juan.alonso@staempfli.com
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
   <type name="Magento\Cms\Helper\Wysiwyg\Images">
       <plugin name="staempfli_wysiwyg_image_html_declaration" type="\Staempfli\WidgetExtraFields\Plugin\WysiwygImagePlugin"/>
   </type>
    <type name="Magento\Cms\Block\Adminhtml\Wysiwyg\Images\Content">
        <plugin name="staempfli_wysiwyg_image_content" type="\Staempfli\WidgetExtraFields\Plugin\WysiwygImagePlugin"/>
    </type>
</config>