Unable to set summary row above details instead of the default below details. Seems to be a simple summary row(column) property as written here:

https://msdn.microsoft.com/en-us/vba/excel-vba/articles/outline-summaryrow-property-excel

Also described here: https://msdn.microsoft.com/en-us/library/office/aa215731(v=office.11).aspx

Also implemented in excel4node