Smile\ElasticsuiteSwatches\Block\Navigation\Renderer\Swatches::_toHtml PHP Method

    protected function _toHtml()
    {
        $html = false;
        if ($this->canRenderFilter()) {
            $html = $this->getLayout()->createBlock($this->block)->setSwatchFilter($this->getFilter())->toHtml();
        }
        return $html;
    }