protected function setClassesToRun()
    {
        foreach ($this->listOfFiles as $filename => $file) {
            // Exclude non-PHP files
            if (!Utils::isFilePhp($filename)) {
                continue;
            }

            // Exclude non-Controller classes
            if (!Utils::doesFileContain($filename, 'extends Controller')) {
                continue;
            }

            // Set the classes to run
            $this->classesToRun[] = $this->namespace . '\\' . pathinfo($filename, PATHINFO_FILENAME);
        }
    }