London Feature: Multi-Row Variable Sets

I had to try this out and since the docs don't really show how it works here's screenshot and video. Londonvariable set

Here's a video showing the parts of this.

It's pretty neat the content if you do a g_form.getValue('variableSetName'); is a stringified JSON array.

g_form.getValue('questions'); returns below
\"question\":\"What do you need help with?\",