Missing paramater type documentation for 'symbol definition' type.

[Postur]

When developing, I noticed an input parameter type of 'symbol definition'.
However, there is no mention of this on the 'Plug-in Parameter Type.md' documentation page.
https://github.com/Vectorworks/developer-scripting/blob/main/VectorScript/pages/Plug-in%20Parameter%20Types.md

I imagine this is for allowing the user to input a symbol definition before execution.
Which is exactly what I want/need, but for the moment it seems like it does nothing.

Is this a feature planned for the future? Or is there some way I can start using this?
Any info would be greatly appreciated.

[VectorworksDeveloper]

Here is some information if someone experiments and is willing to contribute to fixing this:
https://forum.vectorworks.net/index.php?/topic/125045-using-plugin-parameter-type-material/