Given a hash like so:

```
h = {
  "actual_amount" => 20,
  "otherkey" => "value",
  "otherkey2" => [{"actual_amount" => 30, "random_amount" => 45}]
}

```

where there are any number of layers of nesting, is there a simple way to pluck all the key-value pairs (or just the values) of the keys that are `actual_amount`?