[jopendocument] Read data range groups from .ods file

[Cris]

hi!

I'm trying to read from a spreadsheet that has data range groups in
it.

i.e:
              [A]                                [A]
[+] [1] [A1 Content]         [-] [1] [A1 Content]
     [4] [A4 Content]          |  [2] [A2 Content]
[+] [5] [A5 Content]          |_[3] [A3 Content]
                                         [4] [A4 Content]
                                     [-] [5] [A5 Content]
                                      |_[6] [A6 Content]

in my very basic function usign jOpenDocument to get the sheet and
read the cells, when I try to read A2, instead of "A2 Content" I get
"A4 Content", when I go for A3 i get "A5 Content" and when I go for A4
i get nothing.

so these lines are not visible for the library, maybe they are to be
collected from the cell they belong to?
is it supported to read these?

thanks!