Nested YAML variables overwriting parent array

[cossssmin]

I have a situation where I need to overwrite a single nested key/value pair inside an array, with YAML Front Matter. For example, consider this array in config.php:

return [
    'foo' => [
        'bar' => true,
        'baz' => 'something',
    ],
   // other config keys
];

Using YAML, I wanted to set baz to something else for a certain page:

---
extends: _layouts.master
section: content
foo:
  baz: 'something else'
---

Doing this currently replaces the/creates a new foo array. So this:

<pre>
    <code>{{ var_dump($page->foo) }}</code>
</pre>

... will output this:

object(TightenCo\Jigsaw\IterableObject)#390 (1) {
  ["items":protected]=>
  array(1) {
    ["baz"]=>
    string(21) "something else"
  }
}

If possible, it would be great if Jigsaw would merge in what you specify in YAML, instead of replacing the/creating a new foo. Hope this makes sense.

Thanks!

[cossssmin]

Also worth mentioning is the concept of YAML Anchors, References, and Extends.

However, I think this would get pretty tedious to have to write all the time, so maybe just merging nested variables with the parent by default would be much easier from a user perspective (?)