src/Merger.php
public function addRaw(string $content, PagesInterface $pages = null): void
    {
        $this->sources[] = new RawSource($content, $pages);
    }
public function addRaw(string $content, PagesInterface $pages = null): void
    {
        $this->sources[] = new RawSource($content, $pages);
    }
Add raw PDF from string