json: introduce special class to create JSON multi-dim arrays
json: introduce special class to create JSON multi-dim arrays

JSON fully reproduces dimenstions of original data member

tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot