如何将光标聚焦在ckeditor5中插入文本的末尾？

const editor = ClassicEditor
    .create( document.querySelector( '#editor' ) )
    .then( editor => {
        // 获取到CKEditor5实例
    } )
    .catch( error => {
        console.error( error );
    } );

const doc = editor.model.document;

doc.insertContent( '要插入的文本内容' );

doc.change( writer => {
    writer.setSelection( doc.selection.getLastPosition() );
} );

const editor = ClassicEditor
    .create( document.querySelector( '#editor' ) )
    .then( editor => {
        const doc = editor.model.document;
        doc.insertContent( '要插入的文本内容' );
        doc.change( writer => {
            writer.setSelection( doc.selection.getLastPosition() );
        } );
    } )
    .catch( error => {
        console.error( error );
    } );