I copied the angular wrapper fiddle and added initial column sorting to the second column, as well as a delay before the columns are populated: https://jsfiddle.net/bfelda/u26nt48b/
Note the column doesn’t sort as expected, however the header does have the arrow, and clicking the header does sort the columns correctly. I am guessing I am to rebind after the data is set but not really finding any resources for this.