s key from a file: &quot;RelativePathname__MD5&quot;.</p>

    <code class="phpdocumentor-code phpdocumentor-signature ">
    <span class="phpdocumentor-signature__visibility">public</span>
                    <span class="phpdocumentor-signature__name">createKeyFromFile</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Symfony\Component\Finder\SplFileInfo">SplFileInfo</abbr>&nbsp;</span><span class="phpdocumentor-s