private function indentMultilineYamlArray(string $yaml): string
    {
        // But, if the *value* is an array, then ITS children will
        // also need to be indented artificially by the same amount
        $yaml = str_replace("\n", "\n".$this->getCurrentIndentation(), $yaml);

        // now indent this level
        return $this->getCurrentIndentation().$yaml;
    }