GroupBy can't be properly formatted

using Jupyter Lab 4.0.2 and latest versions of kotlin jupyter and kotlin/dataframe
(don't know how to get kotlin jupyter and kotlin/dataframe version, but I just installed them today

after running dataFrame.groupBy{...}, the returned value is org.jetbrains.kotlinx.dataframe.impl.GroupByImpl
the mem, ssd, vad columns are LongArrays, it is correctly formatted like this

but long model strings are shortened

I'd like to change that, but not globally, just for this dataframe. so I write the following code, but it has 3 problems

1. LongArray columns are not properly rendered(there is no toHTML in GroupByImpl, and using into(...) results in the same problem

2. cellContentLimit=-1 is not working according to doc
   https://kotlin.github.io/dataframe/tohtml.html#configuring-display-for-individual-output

3. cell text is wrapped, while the dataframe is also horizontally scrollable. how can we disable cell text wrapping?