Designer 4.8, JSON Array and JSON Object nouns?

Hi,

I see these nouns in the argument builder in Designer 4.8 that I haven't seen before.

But I can find any documentation on them and I can't find them in the dirxmlscript.dtd for 4.8.

One is named token-json-array in the XML.

Does anybody have any more information on how to use them etc?

Thanks

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