public function getCheckbox($name, array $options=[]) {
		$choices = $this->getChoices();
		$default = $this->value;

		$value = isset($options['value']) ? $options['value']:null;
		if($value===null) {
			foreach($choices as $k=>$v) {
				if($v == $name) {
					$value = $k;
					break;
				}
			}
		}
		if($value === null)
			throw new \Exception('No value for checkbox '.$name);

		if(in_array($value, $default))
			$options['attrs']['checked'] = 'checked';
		$options['label'] = $name;

		return $this->getTopForm()->getWidget('checkbox', $this->name.'[]', $value, $options);
	}