Questions about the JSON object

I have a few questions about the JSON object that comes with Construct 3:

Question 1: Is it possible to use "Has key" to find a child key of a root object without iterating through the object? If so, how? I can't get it to work.

Question 2: How do you target the root for iteration? Do you just specify an empty string (i.e. "")?

Question 3: How exactly do you iterate through an entire JSON object?

I've tried doing:

json: For each entry in "" set debug to debug&" / "&json.CurrentKey

But it just keeps printing the root key over and over, without returning the child objects.

Thanks in advance.

1. Don't think it's possible.

2. Empty path "" works for me.

3. You can recursively call a function to read the entire JSON: