Trying to get and set array data inside an object - drupal-8

Question

I'm trying to extract (and set) from the screenshot below the conf->folders inside profile array. I am able to access other things such as "id" using $profile->id(). I tried what was suggested in other SO questions " $profile->conf['folders'] " which fails.
$folders = array();
$some_settings = \Drupal::config('some.settings');
foreach ($ids as id) {
$profile = $storage->load($some_settings[$id]);
$folders[] = $profile->conf['folders']; // Fails to get array
}
When finished want to reset the value to something (much like this):
$profile->conf['folders'] = $folders;

Answer 1

I seemed to have figured it out, I am new to Drupal programming but it seems I can do the following:
$folders = array();
$some_settings = \Drupal::config('some.settings');
foreach ($ids as id) {
$profile = $storage->load($some_settings[$id]);
$folders[] = $p->get('conf')['folders'];
}
// In following, $profile->set('conf.folders', $folders); should have worked instead, instead resigned 'conf' instead of just 'folders'.
$conf = $profile->get('conf');
$conf["folders"] = $folders;
$profile->set('conf', $conf);
Parsed from documents such as this:
https://www.drupal.org/docs/8/api/entity-api/working-with-the-entity-api