columnDefs "name" not changing header text

okkko

Hi,

I'm trying to change some column's names according to the reference, but obviously I'm missing something, because it's not working:

jsfiddle example

Thanks for any help.

Edit: Obviously I'm an idiot. I thought that option changes column header text (use keyword "title"!!), but it's just for further api reference. Sorry. You can delete this.