+ /**\r
+ * Add a trunk of css text to the editor which will be applied to the wysiwyg editing document.\r
+ * Note: This function should be called before editor is loaded to take effect.\r
+ * @param css {String} CSS text.\r
+ * @example\r
+ * editorInstance.addCss( 'body { background-color: grey; }' );\r
+ */\r