AdamWathan\Form\Elements\Element::removeClass PHP Method

    public function removeClass($class)
    {
        if (!isset($this->attributes['class'])) {
            return $this;
        }
        $class = trim(str_replace($class, '', $this->attributes['class']));
        if ($class == '') {
            $this->removeAttribute('class');
            return $this;
        }
        $this->setAttribute('class', $class);
        return $this;
    }