That is correct, @sam.demands
The following method does not work for nestedHeaders as the logic is based on colHeaders that do not change when we add nestedHeaders. Now, how to get them. If you do not need to have them merged and in this case
The response can be
D | E | E | E | E | E
2017 | B | C | 12 | 12 | 15
etc.
When I recommend saving the header name in cell meta and then attach that cell meta array into the results array in the beforeCopy hook. It’s a theory, and I haven’t tried it. But that should work, if you do not move/hide headers.