Neither of these transformers return a result to the output:
return []
return false
return true
Also all object arrays that return all fully expanded.
false and true show in the output for me, but not an empty array.
I'm seeing the same thing as socaljoker on this: returning a plain boolean as the output of a transformer previews that value correctly, however when returning an empty array we try to expand that output into the results you'd be looking at and the message instead says "No results returned". While correct I can see how that's a bit confusing and added a request to clarify what the underlying value is here.
In all these cases, I'm seeing the transformer.value property correctly update for the value. You were just referencing the return preview UI right?
Yes, the preview.
false and true are working for me now.