public function setSelected(array $values)
	{
		$this->assertMultiSelect();

		$candidates = array();
		/* @var $candidates SelectOption[] */

		foreach ( $this->getOptions() as $option ) {
			if ( in_array($option->getValue(), $values) ) {
				$candidates[] = $option;
			}
		}

		return $this->selectOptions($candidates);
	}