When using native subclassing API, the docs demonstrate how to create a float array property, but there is no talk of TDictionaries or TSets. Are those possible yet?

Furthermore I have not been able to create a function which takes an array either. I tried list, list(str) and [str], but list isn't supported altogether (missing __args__ attribute) and [str] cannot be parsed (leaving the parameter ignored). Is this not possible yet?