* an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
* content.
*
- * @param Content|null|false|string $content
+ * @param Content|null|bool|string $content
* @return String the editable text form of the content.
*
* @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.