PhpOffice\PhpPresentation\Shape\RichText\TextElement::setLanguage PHP Метод

    public function setLanguage($language)
    {
        $this->language = $language;
        return $this;
    }

 public function testLanguage()
 {
     $object = new TextElement();
     $this->assertNull($object->getLanguage());
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\RichText\\TextElement', $object->setLanguage('en-US'));
     $this->assertEquals('en-US', $object->getLanguage());
 }