What is your use-case and why do you need this feature?

Currently, Properties allow to parse Map<String, Any> object to a Kotlin class. Usually, such properties are loaded from configuration file. While we do not have multiplatform IO or files, we still can parse properties from a string contents of such file, since parsing line breaks/separators/etc is an additional amount of work.

Originally reported here: https://youtrack.jetbrains.com/issue/KT-42716

Note: it is relatively easy task though with common collection operations.