I have a Question regarding XLSX.jl:

One can insert a 2 dimensional data matrix `MA`

via,

```
XLSX.openxlsx("my_Test.xlsx", mode="rw") do xf
sheet = xf[1]
sheet["C7"] = MA
end
```

but if I want to add this matrix in column 100 row 7 then I did not find out how a easy way to do it.

One can access the content of column 100 row 7 via `sheet[100,7]`

.

But for `sheet[100,7] = MA`

no method is defined.

For inserting the matrix one needs a cell reference in the style `sheet["CO7"]`

.

How can I find out what the cell reference for `sheet[100,7]`

is?

How to get in XLSX.jl a XLSX.CellRef from column and row number

Many Thanks

Gerhard