Question about JSONPath and retrieving the "keys" instead of values

[lsijzoazprstotosgq]

Hello,

I have a 1110 line JSON that I am referencing via an LLD Discovery Rule.

There is an array in the JSON that is 3 elements long with a bunch of subsequent segments.


Here is a snippet of my JSON, the array, keys, and segments I am referring to...

https://i.imgur.com/cfSFfIQ.png

Ultimately I want to grab the keys of each element [0,1,2]. I found I can accomplish this with *~ here...
https://stackoverflow.com/questions/...t-keys-in-json

Here is a picture of it working in jsonpath.com...

https://i.imgur.com/zlU9VpH.png

Here I am using it as an LLD Macro...

https://i.imgur.com/mmF9eNg.png

But I get the following error message: Cannot process LLD macro "{#MACRO}": unsupported construct in jsonpath starting with: "~]".

https://i.imgur.com/LHf3mgX.png

Is this a limitation in Zabbix or am I doing this wrong?