Full Reference does not contain transform docs

[AbdealiLoKo]

I saw the really nice transform feature in plotly traces and was trying to do a filter. In the examples - I saw examples for filtering things like y > 5 etc. I wanted to do a categorical filter and the data I wanted to filter using was neither x nor y. So, I thought of going to the Full Reference to understand all the properties it supports.

When I go to Javascript > Full Reference, I could not see any documentation about the transforms except that it is a list of objects in all the trace types:

transforms 
Each object has one or more of the keys listed below.