protected function extendPush($section, $content)
    {
        if (! isset($this->pushes[$section])) {
            $this->pushes[$section] = [];
        }

        if (! isset($this->pushes[$section][$this->renderCount])) {
            $this->pushes[$section][$this->renderCount] = $content;
        } else {
            $this->pushes[$section][$this->renderCount] .= $content;
        }
    }