As a user, I should be able to export Multi Cascade Field from Table Grid

As a user, I should be able to export Multi Cascade Field from Table Grid, and I should be able to export to an XLS document.

Current status

When we export a Multi Cascade Field, the output is: 
[

{"levelName":"Info1","selectedOptionValue":"ABC","selectedOptionLabel":"ABC"}

, 

{"levelName":"Info2","selectedOptionValue":"123","selectedOptionLabel":"123"}

]

Expected result

When we export a Multi Cascade Field, the output should be: 
option1: [

{"Info1":"ABC"}

,

{"Info2","123"}

,

{"Info3":"456"}

,

{"Info4":"789"}

]
option2: ["ABC","123","456","789"]