/**
* Renders a text area.
* The model attribute value will be used as the content in the textarea.
* @param array $options the tag options in terms of name-value pairs. These will be rendered as
* the attributes of the resulting tag. The values will be HTML-encoded using [[Html::encode()]].
*
* If you set a custom `id` for the textarea element, you may need to adjust the [[$selectors]] accordingly.
*
* @return $this the field object itself
*/
public function textarea($options = [])
{
$options = array_merge($this->inputOptions, $options);
$this->adjustLabelFor($options);
$options['ng-model-options'] = $this->getNgModelOptions();
$this->parts['{input}'] = Html::activeTextarea($this->model, $this->attribute, $options);
return $this;
}