I had to try this out and since the
docs
don't really show how it works here's screenshot and video. London
variable 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
/*
"[
{
\"order\":\"100\",
\"question\":\"What do you need help with?\",
\"required\":\"Yes\",
\"help_text\":\"\"
}
]"
*/