- Note: from Puppet 5.5.0, the compatible function with the same name in Puppet core
- will be used instead of this function.
+ @return [Array]
+ An array containing each of the hashes key values.
+
+ > **Note:** **Deprecated** from Puppet 5.5.0, the built-in [`keys`](https://puppet.com/docs/puppet/latest/function.html#keys)
+ function will be used instead of this function.