如何在CKEditor 5中创建一个不可编辑的文本块。
我需要在最终视图中生成的东西：

<div>Non editable message here</div>

我尝试使用UIElement，然后设置innerHTML，但这仍然使元素可编辑。
仅供参考：她是我最终使用的插件.

import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
import DecoupledEditor from '@ckeditor/ckeditor5-editor-decoupled/src/decouplededitor';
import Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';
import Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';
import Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';
import Heading from '@ckeditor/ckeditor5-basic-styles/src/bold';
import Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';
import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';
import imageIcon from '@ckeditor/ckeditor5-core/theme/icons/image.svg';
import Command from '@ckeditor/ckeditor5-core/src/command';
import { downcastElementToElement,downcastAttributeToAttribute,downcastAttributeToElement } from '@ckeditor/ckeditor5-engine/src/conversion/downcast-converters';
import { upcastElementToElement, upcastAttributeToAttribute,modelToViewAttributeConverter} from '@ckeditor/ckeditor5-engine/src/conversion/upcast-converters';
import attachPlaceholder from "@ckeditor/ckeditor5-engine/src/view/placeholder";
import ViewPosition from '@ckeditor/ckeditor5-engine/src/view/position';
import toWidgetEditable from '@ckeditor/ckeditor5-widget/src/utils';
import ClickObserver from '@ckeditor/ckeditor5-engine/src/view/observer/clickobserver';
import UpcastDispatcher from '@ckeditor/ckeditor5-engine/src/conversion/upcastdispatcher'; 
import { toWidget } from '@ckeditor/ckeditor5-widget/src/utils';

export default class TestWidget2 extends Plugin {
    static get pluginName() {
        return 'TestWidget2';
    }

    init() {
        console.log('TestWidget2::init()');
        const editor=this.editor;
        const model=editor.model;

        model.schema.register( 'myWidget', {
            inheritAllFrom: '$block',
            isObject: true
        } );

        editor.conversion.for( 'dataDowncast' )
            .add( downcastElementToElement( {
                model: 'myWidget',
                view: ( modelItem, writer ) => {
                    const elm=writer.createContainerElement( 'div', { class: 'widget' } );
                    return toWidget( div, writer, { label: 'widget label' } );
                }
            } ) );

        editor.conversion.for( 'editingDowncast' )
            .add( downcastElementToElement( {
                model: 'myWidget',
                view: ( modelItem, writer ) => {
                    const div = writer.createContainerElement( 'div', { class: 'widget' } );

                    return toWidget( div, writer, { label: 'widget label' } );
                }
            } ) );

        editor.conversion.for( 'upcast' )
            .add( upcastElementToElement( {
                view: {
                    name: 'div',
                    class: 'widget'
                },
                model: 'myWidget'
            } ) );
    }
}