Is it possible to retrieve a key name as opposed to a value? e.g **FROM**: ``` "resources": [{ "params": { "one": "optional", "two": "optional", "three": "optional" } }, { "params": { "four": "optional", "five": "optional", "six": "optional" } }] ``` **TO:** ``` [ "one", "two", "three", "four", "five", "six" ] ```
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