- Note: from Puppet 6.0.0, the compatible function with the same name in Puppet core
- will be used instead of this function.
+ > *Note:* **Deprecated** from Puppet 6.0.0, this function has been replaced with a
+ built-in [`downcase`](https://puppet.com/docs/puppet/latest/function.html#downcase) function.
+ >
+ This function is an implementation of a Ruby class and might not be UTF8 compatible.
+ To ensure compatibility, use this function with Ruby 2.4.0 or greater.
+
+ @return [String] The converted String, if it was a String that was given
+ @return [Array[String]] The converted Array, if it was a Array that was given