function _handleChange(event) {
  var props = this._currentElement.props;
  var returnValue = LinkedValueUtils.executeOnChange(props, event);
  ReactUpdates.asap(forceUpdateIfMounted, this);
  return returnValue;
}
Implements a <textarea> native component that allows setting `value`, and
`defaultValue`. This differs from the traditional DOM API because value is
usually set as PCDATA children.

If `value` is not supplied (or null/undefined), user actions that affect the
value will trigger updates to the element.

If `value` is supplied (and not null/undefined), the rendered element will
not trigger updates to the element. Instead, the `value` prop must change in
order for the rendered element to be updated.

The rendered element will be initialized with an empty value, the prop
`defaultValue` if specified, or the children content (deprecated).