just imagine code complexity for that feature?
how would you think should behave DataGrid when you'll populate your separate arrays with variable items number each?
all you are able and should do is to build composite dataProvider source, join all your separate arrays into it, this is your responsibility.
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Thank you. I agree with your logic. Could you please point me to documentation or examples about joining multiple arrays into one data provider? I can't seem to find anything...
I mean merge rather than join, so it's completely depends on what your data structure is and how to handle it, the only solution I see
is to merge/aggregate data you have from multiply array sources into simple records/rows set which could be easily used as dataProvider for any visual list-based widget including dataGrid.