CraftCli\Support\DirectoryHelper::verifyFileExists PHP Method

    public function verifyFileExists($path, $label = 'path')
    {
        if (realpath($path) === false) {
            throw new Exception(sprintf('Could not resolve the %s at %s', $label, $path));
        }
        if (!file_exists($path)) {
            throw new Exception(sprintf('Could not find the %s at %s', $label, $path));
        }
    }