First off, great work to the tooling team around the latest version of CLI. I've noticed a few improvements so far.
So i'm compiling and debugging the sample dataset component:
https://docs.microsoft.com/en-us/powerapps/developer/component-framework/sample-controls/data-set-grid-control
And it runs great inside the harness:

And noticed, it is generating for 3 records. And within :
context.parameters.sampleDataSet
I can indeed see that there are three recid's. Is there anyway to set this any arbitary number? E.g. fill an entire screen with 50 records?
Cheers!
Andrew