public function openTag($tagName)
    {
        $this->append(sprintf('<%s', $tagName));
        $this->tag = $tagName;

        return $this;
    }
public function openTag($tagName)
    {
        $this->append(sprintf('<%s', $tagName));
        $this->tag = $tagName;

        return $this;
    }
public function openTag ( $ tagName ) { $ this -> append ( sprintf ( '<%s' , $ tagName ) ) ; $ this -> tag = $ tagName ; return $ this ; }
Opens a tag

@param string $tagName
@return \Krystal\Form\NodeElement
Opens a tag