Nette\Loaders\RobotLoader::updateFile PHP Method

    private function updateFile($file)
    {
        foreach ($this->classes as $class => $info) {
            if (isset($info['file']) && $info['file'] === $file) {
                unset($this->classes[$class]);
            }
        }
        if (is_file($file)) {
            foreach ($this->scanPhp(file_get_contents($file)) as $class) {
                $info =& $this->classes[strtolower($class)];
                if (isset($info['file']) && @filemtime($info['file']) !== $info['time']) {
                    // @ file may not exists
                    $this->updateFile($info['file']);
                    $info =& $this->classes[strtolower($class)];
                }
                if (isset($info['file'])) {
                    throw new Nette\InvalidStateException("Ambiguous class {$class} resolution; defined in {$info['file']} and in {$file}.");
                }
                $info = ['file' => $file, 'time' => filemtime($file), 'orig' => $class];
            }
        }
    }